CN209458197U - A kind of axial force balance structure of single-stage magnetic centrifugal pump - Google Patents
A kind of axial force balance structure of single-stage magnetic centrifugal pump Download PDFInfo
- Publication number
- CN209458197U CN209458197U CN201822254702.9U CN201822254702U CN209458197U CN 209458197 U CN209458197 U CN 209458197U CN 201822254702 U CN201822254702 U CN 201822254702U CN 209458197 U CN209458197 U CN 209458197U
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- China
- Prior art keywords
- balance
- pump housing
- impeller
- axial force
- balance cylinder
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- Control Of Non-Positive-Displacement Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a kind of axial force balance structures of single-stage magnetic centrifugal pump, including radially from the first balance cylinder (3) and the second balance cylinder (8) being successively set on impeller (1) back shroud outside to inside, first balance cylinder (3) is connected by the first balance hole (2) being provided on impeller (1) with impeller (1) entrance, second balance cylinder (8) is connected by the second balance hole (7) being provided on impeller (1) with impeller (1) entrance, first pump housing choma (4) is installed on the pump housing on the outside of first balance cylinder (3), second pump housing choma (6) is installed on the pump housing between first balance cylinder (3) and the second balance cylinder (8).Compared with prior art, the utility model is reduced the axial force of single-stage magnetic centrifugal pump, is improved its reliability of operation, while eliminating welding structure, reduce manufacturing time and cost using double flat weighing apparatus cell structure.
Description
Technical field
The utility model relates to a kind of centrifugal pump structures, more particularly, to a kind of axial force balance of single-stage magnetic centrifugal pump
Structure.
Background technique
Axial force balance plays critical work to the safety of single-stage magnetic centrifugal pump operation, reliability and durability
With magnetic drive pump bears axial force since structure limits, using the silicon carbide thrust bearing of medium lubrication, therefore it is required that remaining axial
Power is small and direction is stablized.
The mode for the balancing axial thrust that single-stage magnetic centrifugal pump is widely used at present is that balance hole adds back blade, using balance
When the balancing axial thrust of hole, the identical sealing ring of two diameters is filled on the forward and backward cover board of impeller, and after the impeller cover board choma with
Six apertures, referred to as balance hole are equably opened in lower position, and the balance cylinder of back shroud is made to be connected with suction eye, to reach flat
The purpose for the axial force that weighs, back blade are welded on wheel backface, the balancing axial in such a way that back blade reduces impeller backside pressure
Power.
The disadvantage is that back blade needs to be welded on wheel backface, welding needs working hour longer, and welding stress will lead to runner
Deformation reduces efficiency, while back blade balancing axial thrust strictly relies on the gap of itself and pump cover, and gap is too large or too small all
The size or direction for making axial force generate variation, influence the reliability of pump operation.
Utility model content
The purpose of this utility model is exactly to provide a kind of single-stage magnetic force to overcome the problems of the above-mentioned prior art
The axial force balance structure of centrifugal pump.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of axial force balance structure of single-stage magnetic centrifugal pump, including radially from setting gradually outside to inside after the impeller
The first balance cylinder and the second balance cylinder on cover board form double flat weighing apparatus cell structure, and first balance cylinder is by being provided with impeller
On the first balance hole be connected with impeller eye, second balance cylinder passes through the second balance hole and leaf that are provided on impeller
Wheel entrance is connected, and is equipped with the first pump housing choma on the pump housing on the outside of first balance cylinder, first balance cylinder and the
Second pump housing choma is installed on the pump housing between two balance cylinders.
Further, the volume of second balance cylinder is greater than the first balance cylinder.
Further, the length of second balance hole is greater than the first balance hole.
Further, first pump housing choma is circular ring shape.
Further, second pump housing choma is L-type.
Further, there are radial clearance, second pump housing choma and pumps between first pump housing choma and the pump housing
There are radial clearances between body.
Further, impeller place opposite with the first pump housing choma is also equipped with impeller port ring.
Fluid passes through the first balance hole, depressurizes by the first pump housing choma, into the first balance cylinder；Fluid is flat by second
Weighing apparatus hole, is depressurized by the second pump housing choma, and into the second balance cylinder, the second indoor fluid pressure of balance is lower than the first balance cylinder
Interior pressure, to reduce the pressure of back shroud, plays the role of balancing axial thrust all close to the pressure of impeller eye.
Compared with prior art, the utility model reduces the axial direction of single-stage magnetic centrifugal pump using double flat weighing apparatus cell structure
Power improves its reliability of operation；Singly balanced room residual axial force is big, while needing to cooperate back shroud welding back blade auxiliary
Balancing axial thrust, and double balance cylinders can be effectively reduced the axial force of single-stage magnetic centrifugal pump, reduce residual axial force, Ke Yidan
It solely uses, eliminates the welding structure of back blade, reduce manufacturing time and cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Shown in figure label:
1, impeller, the 2, first balance hole, the 3, first balance cylinder, the 4, first pump housing choma, 5, impeller port ring, 6, second pump housing
Choma, the 7, second balance hole, the 8, second balance cylinder.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
Embodiment
A kind of axial force balance structure of single-stage magnetic centrifugal pump, as shown in Figure 1, including radially from successively setting outside to inside
The first balance cylinder 3 and the second balance cylinder 8 on 1 back shroud of impeller are set, forms double flat weighing apparatus cell structure, the first balance cylinder 3 passes through
The first balance hole 2 being provided on impeller 1 is connected with 1 entrance of impeller, the second balance cylinder 8 by be provided on impeller 1
Two balance holes 7 are connected with 1 entrance of impeller, are equipped with the first pump housing choma 4 on the pump housing in 3 outside of the first balance cylinder, first is flat
The second pump housing choma 6 is installed on the pump housing between weighing apparatus room 3 and the second balance cylinder 8.It is flat that the volume of second balance cylinder 8 is greater than first
Weighing apparatus room 3.The length of second balance hole 7 is greater than the first balance hole 2.First pump housing choma 4 is circular ring shape.Second pump housing choma 6 is L
Type.There are radial clearances between first pump housing choma 4 and the pump housing, and there are radial clearances between the second pump housing choma 6 and the pump housing.Leaf
Wheel 1 and the opposite place of the first pump housing choma 4 are also equipped with impeller port ring 5.
Fluid flows through the first balance hole 2, depressurizes by the first pump housing choma 4, into the first balance cylinder 3；Fluid flows through
Two balance holes 7 are depressurized by the second pump housing choma 6, and into the second balance cylinder 8, fluid pressure in the second balance cylinder 8 is lower than the
Pressure in one balance cylinder 3 plays the role of balancing axial thrust to reduce the pressure of back shroud.
It can understand the above description of the embodiments is intended to facilitate those skilled in the art and use practical
It is novel.Person skilled in the art obviously easily can make various modifications to these embodiments, and illustrating herein
General Principle be applied in other embodiments without having to go through creative labor.Therefore, the utility model is not limited to above-mentioned
Embodiment, those skilled in the art's announcement according to the present utility model, do not depart from improvement that the utility model scope is made and
Modification should be all within the protection scope of the utility model.
Claims (7)
1. a kind of axial force balance structure of single-stage magnetic centrifugal pump, which is characterized in that including radially from successively setting outside to inside
The first balance cylinder (3) and the second balance cylinder (8) on impeller (1) back shroud are set, first balance cylinder (3) is by being provided with
The first balance hole (2) on impeller (1) is connected with impeller (1) entrance, and second balance cylinder (8) is by being provided with impeller
(1) the second balance hole (7) on is connected with impeller (1) entrance, and is equipped on the pump housing on the outside of first balance cylinder (3)
One pump housing choma (4) is equipped with the second pump housing choma on the pump housing between first balance cylinder (3) and the second balance cylinder (8)
(6)。
2. a kind of axial force balance structure of single-stage magnetic centrifugal pump according to claim 1, which is characterized in that described
The volume of two balance cylinders (8) is greater than the first balance cylinder (3).
3. a kind of axial force balance structure of single-stage magnetic centrifugal pump according to claim 1, which is characterized in that described
The length of two balance holes (7) is greater than the first balance hole (2).
4. a kind of axial force balance structure of single-stage magnetic centrifugal pump according to claim 1, which is characterized in that described
One pump housing choma (4) is circular ring shape.
5. a kind of axial force balance structure of single-stage magnetic centrifugal pump according to claim 1, which is characterized in that described
Two pump housing chomas (6) are L-type.
6. a kind of axial force balance structure of single-stage magnetic centrifugal pump according to claim 1, which is characterized in that described
There are radial clearances between one pump housing choma (4) and the pump housing, and there are between radial direction between second pump housing choma (6) and the pump housing
Gap.
7. a kind of axial force balance structure of single-stage magnetic centrifugal pump according to claim 1, which is characterized in that the leaf
Wheel (1) and the opposite place of the first pump housing choma (4) are also equipped with impeller port ring (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822254702.9U CN209458197U (en) | 2018-12-29 | 2018-12-29 | A kind of axial force balance structure of single-stage magnetic centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822254702.9U CN209458197U (en) | 2018-12-29 | 2018-12-29 | A kind of axial force balance structure of single-stage magnetic centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209458197U true CN209458197U (en) | 2019-10-01 |
Family
ID=68043214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822254702.9U Expired - Fee Related CN209458197U (en) | 2018-12-29 | 2018-12-29 | A kind of axial force balance structure of single-stage magnetic centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209458197U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883084A (en) * | 2021-09-01 | 2022-01-04 | 浙江大学 | Automatic axial force balancing device of magnetic suspension centrifugal pump under high-power working condition and application |
-
2018
- 2018-12-29 CN CN201822254702.9U patent/CN209458197U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113883084A (en) * | 2021-09-01 | 2022-01-04 | 浙江大学 | Automatic axial force balancing device of magnetic suspension centrifugal pump under high-power working condition and application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191001 Termination date: 20211229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |