CN208686588U - A kind of low temperature vertical immersed pump and its axial force balance mechanism - Google Patents
A kind of low temperature vertical immersed pump and its axial force balance mechanism Download PDFInfo
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- CN208686588U CN208686588U CN201821110439.XU CN201821110439U CN208686588U CN 208686588 U CN208686588 U CN 208686588U CN 201821110439 U CN201821110439 U CN 201821110439U CN 208686588 U CN208686588 U CN 208686588U
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- pump shaft
- floating structure
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Abstract
A kind of low temperature vertical immersed pump and its axial force balance mechanism, the low temperature vertical immersed pump includes the end cap of pump shaft and sequential connection, electric machine casing, first adapter, first pressure-bearing shell, second adapter, second pressure-bearing shell and entrance volute, the pump shaft is by bearing support on first adapter and the second adapter, it further include the axial force balance mechanism being arranged between impeller and bearing, it include: rotor floating structure, it is mounted on the pump shaft and is located at close to the side of the impeller, there is radial clearance between the rotor floating structure and first adapter；Balancing frame is connect on the pump shaft and with first adapter, which is located between the bearing and the rotor floating structure, has axial gap between the balancing frame and the rotor floating structure；Wherein, there is the first counter balance pocket between the balancing frame and the rotor floating structure, there is the second counter balance pocket between the balancing frame and the bearing.
Description
Technical field
The utility model relates to a kind of low temperature immersed pump, especially a kind of high pressure LNG low temperature vertical immersed pump and its multistage
Pump axial force balance mechanism.
Background technique
Pump can be realized zero leakage in the pressure vessel of sealing with motor integral installation, uses by the vertical immersed pump of LNG
In cryogenic medias such as transportation of liquefied natural gas (LNG), ethylene, propane.The balancing frame of such pump and impeller use in the prior art
Integral structure, impeller need to individually produce mold, increase cost.
Utility model content
Technical problem to be solved in the utility model is in view of the above problems in the prior art, to provide a kind of low temperature vertical
Immersed pump and its axial force balance mechanism.
To achieve the goals above, the utility model provides a kind of axial force balance mechanism of low temperature vertical immersed pump,
Wherein, it is arranged between the impeller of low temperature vertical immersed pump and the bearing of support pump shaft, the bearing is mounted on described low
On first adapter of the vertical immersed pump of temperature, the axial force balance mechanism includes:
Rotor floating structure is mounted on the pump shaft and is located at close to the side of the impeller, and the rotor is floating
There is radial clearance between dynamic structure and first adapter；And
Balancing frame connect on the pump shaft and with first adapter, the balancing frame be located at the bearing and
Between the rotor floating structure, there is axial gap between the balancing frame and the rotor floating structure；
Wherein, between the balancing frame and the rotor floating structure have the first counter balance pocket, the balancing frame with it is described
There is the second counter balance pocket between bearing.
Above-mentioned axial force balance mechanism, wherein be provided with wear ring in the outer rim of the rotor floating structure.
Above-mentioned axial force balance mechanism, wherein the wear ring is embedded on the rotor floating structure.
Above-mentioned axial force balance mechanism, wherein the radial clearance is connected to first counter balance pocket.
Above-mentioned axial force balance mechanism, wherein first counter balance pocket and the second counter balance pocket pass through the axial gap
Connection.
Above-mentioned axial force balance mechanism, wherein the balancing frame is bolted on first adapter simultaneously
It is resisted against on the bearing.
Above-mentioned axial force balance mechanism, wherein the rotor floating structure is fixed on the pump shaft by locking nut
On.
In order to which above-mentioned purpose is better achieved, the utility model additionally provides a kind of low temperature vertical immersed pump, including pump shaft
With the end cap of sequential connection, electric machine casing, the first adapter, the first pressure-bearing shell, the second adapter, the second pressure-bearing shell and enter
Mouthful volute, the end cap, electric machine casing, the first adapter, the first pressure-bearing shell, the second adapter, the second pressure-bearing shell and enters
Mouth volute is coaxially disposed and encloses jointly a closed housing, and the pump shaft is arranged in the closed housing and passes through bearing branch
Support is equipped with motor stator on first adapter and the second adapter in the electric machine casing, the pump shaft with it is described
Motor stator connects, and impeller, the impeller peace are provided in first pressure-bearing shell, the second adapter and the second pressure-bearing shell
On the pump shaft, the volute of multiple sequence installations is provided with corresponding to the impeller, wherein further include above-mentioned axial force
Balance mechanism.
Above-mentioned low temperature vertical immersed pump, wherein further include inducer, be arranged in the entrance volute, and be mounted on
On the pump shaft.
Above-mentioned low temperature vertical immersed pump, wherein the inducer is by being threadably mounted on the pump shaft.
The beneficial functional of the utility model is:
The axial force balance mechanism of the utility model is combined using rotor floating structure, fixation-variable restriction gap
The composite structure of adaptive thrust-balancing disk passes through balancing frame and rotor in the case where rotor floating structure leakage rate is certain
The gap size variation of floating structure automatically adjusts to axial force, realizes axial force complete equipilibrium, makes bearing substantially zero
It is operated under thrust loading state, increases the service life of bearing.Using rotor floating structure, rotor floating structure is fixed on pump shaft
On, guarantee its axial gap with balancing frame；Using separate structure, impeller and balancing frame are separated, make impeller knots at different levels
Structure is identical, and impeller and other impeller sharing dies reduce impeller mold, reduce costs；Simultaneously as pump shaft
Longer, after high-speed rotation, pump shaft can radially wobble, and the radial clearance between floating structure and bearing retainer is smaller,
Two components are easily worn, to avoid floating structure integral replacing, in such a way that floating structure inlays wear ring, convenient for more
It changes, reduces costs
The utility model is described in detail below in conjunction with the drawings and specific embodiments, but not as to the utility model
Restriction.
Detailed description of the invention
Fig. 1 is the vertical low temperature immersed pump structural schematic diagram of an embodiment of the present invention；
Fig. 2 is the axial force balance mechanism structural schematic diagram of an embodiment of the present invention.
Wherein, appended drawing reference
1 end cap
2 pump shafts
3 electric machine casings
4 first adapters
5 first pressure-bearing shells
6 impellers
7 second adapters
8 second pressure-bearing shells
9 entrance volutes
10 inducers
11 bearings
12 motors
13 axial force balance mechanisms
131 wear rings
132 bolts
133 rotor floating structures
134 balancing frames
135 locking nuts
136 first counter balance pockets
137 second counter balance pockets
Specific embodiment
Structural principle and working principle of the invention are described in detail with reference to the accompanying drawing:
It is the vertical low temperature immersed pump structural schematic diagram of an embodiment of the present invention referring to Fig. 1, Fig. 1.The utility model
Low temperature vertical immersed pump, including pump shaft 2 and be linked in sequence end cap 1, electric machine casing 3, the first adapter 4, the first pressure-bearing shell
Body 5, the second adapter 7, the second pressure-bearing shell 8 and entrance volute 9, the end cap 1, electric machine casing 3, the first adapter 4, first
Pressure-bearing shell 5, the second adapter 7, the second pressure-bearing shell 8 and entrance volute 9 are coaxially disposed and enclose jointly a closed housing,
Wherein, the end cap 1 is for collecting liquid and conveying.The end cap 1, electric machine casing 3, the first pressure-bearing shell 5, the second pressure-bearing shell
8 and entrance volute 9 on be provided with flange connector, connecting hole, first adapter 4 and are provided on the flange connector
Connection through-hole, the end cap 1, electric machine casing 3, the first adapter 4, the first pressure-bearing shell 5, second are provided on two adapters 7
Adapter 7, the second pressure-bearing shell 8 and entrance volute 9 are sequentially connected by bolt.The pump shaft 2 is arranged in the closed housing
Interior and be supported on first adapter 4 and the second adapter 7 by bearing 11, the pump shaft 2 is for transmitting torque and driving
Impeller 6 rotates.The motor 12 being used to provide power is installed, the pump shaft 2 connects with the motor 12 in the electric machine casing 3
It connects, the impeller for improving liquid energy is provided in first pressure-bearing shell 5, the second adapter 7 and the second pressure-bearing shell 8
6, the impeller 6 is mounted on the pump shaft 2, and the impeller 6 is preferably threadedly secured on the pump shaft 2, corresponds to institute
The volute that impeller 6 is provided with multiple sequence installations is stated, for collecting and conveying liquid.
It may also include the inducer 10 for improving inlet liquid energy, be arranged in the entrance volute 9 and be mounted on
On the pump shaft 2, entrance volute 9 is used as liquid inlet, and for collecting liquid, the inducer 10 is preferably by being threadably mounted at
On the pump shaft 2.
Referring to fig. 2, Fig. 2 is the axial force balance mechanism structural schematic diagram of an embodiment of the present invention.The utility model
Vertical low temperature immersed pump further include axial force balance mechanism 13, the axial force balance mechanism 13 be arranged in low temperature vertical immersed pump
Impeller 6 and support pump shaft 2 bearing 11 between, it is first suitable to be mounted on the low temperature vertical immersed pump for the bearing 11
On orchestration 4, the axial force balance mechanism 13 includes: rotor floating structure 133, is mounted on the pump shaft 2 and is located at close
The side of the impeller 6, the rotor floating structure 133 can be fixed on the pump shaft 2 by locking nut 135, institute
Stating has radial clearance between rotor floating structure 133 and first adapter 4；And balancing frame 134, it is sleeved on the pump
It is connect on axis 2 and with first adapter 4, the balancing frame 134 is located at the bearing 11 and the rotor floating structure 133
Between, the balancing frame 134 can be fixed on first adapter 4 by bolt 132 and is resisted against on the bearing 11, institute
Stating has axial gap between balancing frame 134 and the rotor floating structure 133；Wherein, the balancing frame 134 and the rotor
There is the first counter balance pocket 136 between floating structure 133, there is the second counter balance pocket between the balancing frame 134 and the bearing 11
137, the radial clearance is connected to first counter balance pocket 136, and first counter balance pocket 136 passes through with the second counter balance pocket 137
The axial gap connection.
In the present embodiment, wear ring 131, the wear ring 131 are additionally provided in the outer rim of the rotor floating structure 133
It is preferred that being embedded on the rotor floating structure 133.
The axial force balance mechanism 13, which passes through, is formed by radial clearance between wear ring 131 and the first adapter 4, and turns
It is formed by axial gap between sub- floating structure 133 and balancing frame 134 and realizes axial force automatic balancing, entire rotor floating junction
Structure 133 is in quick condition.When work, if the axial force of 6 import of impeller increases, then rotor floating structure 133 moves right, axis
Reduce to gap, thus leakage rate reduces, and the pressure of the first counter balance pocket 136 is caused to increase, then rotor floating structure 133 is to moving to left
Dynamic, axial gap increases, and leakage rate increases, then the pressure of the first counter balance pocket 136 reduces, rotor floating structure 133 moves right
Dynamic, repeatedly, rotor floating structure 133 is constantly in dynamic equilibrium state.
Balancing frame 134 is fixed on the first adapter 4, balancing frame 134 and rotor by above-mentioned axial force balance mechanism 13
There are axial gap between floating structure 133, there are the first counter balance pocket 136 and the second counter balance pocket 137 in 134 two sides of balancing frame, and first is suitable
The rotor floating structure 133 being fixed on pump shaft 2 is equipped between orchestration 4 and pump shaft 2, rotor floating structure 133 is adapted to first
There are radial clearance between device 4, radial clearance is connected to the first counter balance pocket 136, the second counter balance pocket 137 and low temperature vertical immersed pump
Balanced loop connection.
In short, the axial force balance mechanism of the utility model, using rotor floating structure, fixation-variable restriction gap phase
In conjunction with adaptive thrust-balancing disk combination, to completely eliminate axial out-of-balance force；Using rotor floating structure, by impeller
It is separated with balancing frame, equal dies can be used in impeller and what preceding impeller, reduce costs；Meanwhile rotor floating structure
It is also inlaid with wear ring, it is convenient to replace after abrasion, further reduces costs.
Certainly, the utility model can also have other various embodiments, without departing substantially from the spirit of the present invention and its essence
In the case of, those skilled in the art work as can make various corresponding changes and modifications, but these according to the utility model
Corresponding changes and modifications all should belong to the protection scope of the utility model the attached claims.
Claims (10)
1. a kind of axial force balance mechanism of low temperature vertical immersed pump, which is characterized in that the end of low temperature vertical immersed pump is arranged in
Between grade impeller and the bearing for supporting pump shaft, the bearing is mounted on the first adapter of the low temperature vertical immersed pump, institute
Stating axial force balance mechanism includes:
Rotor floating structure is mounted on the pump shaft and is located at close to the side of the impeller, the rotor floating junction
There is radial clearance between structure and first adapter；And
Balancing frame is connect on the pump shaft and with first adapter, the balancing frame be located at the bearing with it is described
Between rotor floating structure, there is axial gap between the balancing frame and the rotor floating structure；
Wherein, there is the first counter balance pocket, the balancing frame and the bearing between the balancing frame and the rotor floating structure
Between have the second counter balance pocket.
2. axial force balance mechanism as described in claim 1, which is characterized in that be arranged in the outer rim of the rotor floating structure
There is wear ring.
3. axial force balance mechanism as claimed in claim 2, which is characterized in that the wear ring is embedded in the rotor and floats
In structure.
4. axial force balance mechanism as claimed in claim 1,2 or 3, which is characterized in that the radial clearance and described first
Counter balance pocket connection.
5. axial force balance mechanism as claimed in claim 4, which is characterized in that first counter balance pocket and the second counter balance pocket are logical
Cross the axial gap connection.
6. axial force balance mechanism as claimed in claim 4, which is characterized in that the balancing frame is bolted on described
On first adapter and it is resisted against on the bearing.
7. axial force balance mechanism as claimed in claim 4, which is characterized in that the rotor floating structure passes through locking nut
It is fixed on the pump shaft.
8. a kind of low temperature vertical immersed pump, end cap, electric machine casing, the first adapter including pump shaft and sequential connection, first are held
Pressure shell body, the second adapter, the second pressure-bearing shell and entrance volute, the end cap, electric machine casing, the first adapter, first are held
Pressure shell body, the second adapter, the second pressure-bearing shell and entrance volute are coaxially disposed and enclose a closed housing, the pump jointly
Axis is arranged in the closed housing and by bearing support on first adapter and the second adapter, the motor casing
Motor stator is installed in vivo, the pump shaft is connect with the motor stator, first pressure-bearing shell, the second adapter and
Impeller is provided in two pressure-bearing shells, the impeller is mounted on the pump shaft, and the impeller is provided with multiple sequences
The volute of installation, which is characterized in that further include axial force balance mechanism described in any one of the claims 1-7.
9. low temperature vertical immersed pump as claimed in claim 8, which is characterized in that further include inducer, be arranged in the entrance
In volute, and it is mounted on the pump shaft.
10. low temperature vertical immersed pump as claimed in claim 9, which is characterized in that the inducer is by being threadably mounted at
It states on pump shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821110439.XU CN208686588U (en) | 2018-07-13 | 2018-07-13 | A kind of low temperature vertical immersed pump and its axial force balance mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821110439.XU CN208686588U (en) | 2018-07-13 | 2018-07-13 | A kind of low temperature vertical immersed pump and its axial force balance mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208686588U true CN208686588U (en) | 2019-04-02 |
Family
ID=65880546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821110439.XU Active CN208686588U (en) | 2018-07-13 | 2018-07-13 | A kind of low temperature vertical immersed pump and its axial force balance mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208686588U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810411A (en) * | 2020-08-10 | 2020-10-23 | 大连海密梯克泵业有限公司 | Multistage shielding pump with balance disc structure |
| CN112032072A (en) * | 2020-08-22 | 2020-12-04 | 安徽江南泵阀集团有限公司 | Vertical cantilever centrifugal submerged pump |
| CN112879313A (en) * | 2021-01-22 | 2021-06-01 | 东北石油大学 | Submersible centrifugal pump with integrated pump |
-
2018
- 2018-07-13 CN CN201821110439.XU patent/CN208686588U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810411A (en) * | 2020-08-10 | 2020-10-23 | 大连海密梯克泵业有限公司 | Multistage shielding pump with balance disc structure |
| CN112032072A (en) * | 2020-08-22 | 2020-12-04 | 安徽江南泵阀集团有限公司 | Vertical cantilever centrifugal submerged pump |
| CN112879313A (en) * | 2021-01-22 | 2021-06-01 | 东北石油大学 | Submersible centrifugal pump with integrated pump |
| CN112879313B (en) * | 2021-01-22 | 2022-07-01 | 东北石油大学 | Submersible centrifugal pump with integrated pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Song Inventor after: Li Bo Inventor after: Qin Hongchuan Inventor after: Cao Ling Inventor before: Chen Song Inventor before: Li Bo Inventor before: Qin Hongchuan Inventor before: Cao Ling |
|
| CB03 | Change of inventor or designer information |