CN106321502B - A kind of emergent sealing device - Google Patents
A kind of emergent sealing device Download PDFInfo
- Publication number
- CN106321502B CN106321502B CN201610707738.0A CN201610707738A CN106321502B CN 106321502 B CN106321502 B CN 106321502B CN 201610707738 A CN201610707738 A CN 201610707738A CN 106321502 B CN106321502 B CN 106321502B
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- China
- Prior art keywords
- axle sleeve
- internal axle
- sealing device
- emergent
- outer shaft
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention discloses a kind of emergent sealing devices, belong to sealing device field.The emergent sealing device includes：The internal axle sleeve that is fixedly set on motor-operated well pump pump shaft, the outer shaft for being fixed on the liquid trap of motor-operated well pump and being sleeved on pump shaft, coaxially connected adjusting nut on pump shaft and the bearing for carrying the adjusting nut；Wherein, the inner wall of outer shaft is equipped with axial U-shaped sealing ring, internal axle sleeve is located in outer shaft, the inner wall of internal axle sleeve is equipped with radial direction seal ring and one end of the internal axle sleeve is equipped with outward flange, adjusting nut is used to adjust the spacing of one end end face of the outward flange and outer shaft, when the outward flange is pressed on one end end face of outer shaft, axial U-shaped sealing ring is pressed on liquid trap by the other end of internal axle sleeve.The emergent sealing device makes one end of internal axle sleeve that axial U-shaped sealing ring is pressed on liquid trap by rotating adjusting nut, the radial direction seal ring that cooperation internal axle sleeve inner wall is equipped with, to realize emergent sealing.
Description
Technical field
The present invention relates to sealing device field, more particularly to a kind of emergent sealing device.
Background technology
Emergent sealing device refers to that in case of emergency (such as maintenance, replacement parts etc.) are used for realizing one kind of sealing
Device.
A kind of existing emergent sealing device, the emergent sealing device seal use when shaft of submarine pipe repairs.This is emergent close
Seal apparatus includes the shell being fixedly mounted in Ship Structure, and stern tube shaft is interspersed inside housings, and peace is slided between shell and stern tube shaft
Equipped with sliding block；Sliding block is corresponded on the inner wall of shell and is provided with protrusion, and one end of sliding block is fixedly installed block, the other end of sliding block
End face equipped with the shaft shoulder and the end is equipped with sealing ring, is fixed at a certain distance from the end face on stern tube shaft apart from the end of sliding block
Baffle ring forms hydraulic cavities A, is formed between the shaft shoulder, protrusion and the inner wall of shell between block, sliding block, protrusion and the inner wall of shell
Hydraulic cavities B is respectively equipped with and hydraulic cavities A and hydraulic cavities B the channel A being connected to and channel B on shell.When repair, by channel B to
Injection hydraulic oil or compressed gas in hydraulic cavities B, push sliding block to be moved to close to the direction of baffle ring, until sealing ring is pressed on gear
On circle, emergent sealing when repair is played.After the completion of repair, hydraulic oil or compressed gas are injected into hydraulic cavities A by channel A
Body pushes sliding block to be moved to the direction far from baffle ring so that sealing ring is detached from baffle ring, restores to initial non-tight state.
In the implementation of the present invention, inventor has found to have at least the following problems：
It needs to push sliding block by external impetus (hydraulic oil or compressed air) when seal operation so that sealing
Ring is pressed on baffle ring, to realize that emergent sealing when repairing, operation are complex.
Invention content
In order to solve existing emergent sealing device technical problem complicated for operation, it is emergent that an embodiment of the present invention provides one kind
Sealing device.The technical solution is as follows：
An embodiment of the present invention provides a kind of emergent sealing devices, are suitable for the pump shaft of sealing electric deep well pump, described to answer
Anxious sealing device includes：The internal axle sleeve that is fixedly set on the pump shaft, be fixed on the liquid trap of the motor-operated well pump and
It is sleeved on the outer shaft on the pump shaft, coaxially connected adjusting nut on the pump shaft and the carrying adjusting nut
Bearing；
The inner wall of the outer shaft is equipped with axial U-shaped sealing ring and the U-shaped sealing ring of the axial direction is arranged in the liquid collecting
On device, the internal axle sleeve is located in the outer shaft, and the inner wall of the internal axle sleeve is equipped with radial direction seal ring, and the one of the internal axle sleeve
End is equipped with outward flange, and the adjusting nut is used to adjust the spacing of the outward flange and one end end face of the outer shaft, works as institute
When stating outward flange and being pressed on one end end face of the outer shaft, the other end of the internal axle sleeve is by the U-shaped sealing ring pressure of the axial direction
Tightly on the liquid trap.
Preferably, the radial direction seal ring is U-shaped sealing ring.
Further, garter springs are equipped in the groove of the U-shaped sealing ring.
Further, garter springs are equipped in the groove of the U-shaped sealing ring of the axial direction.
Optionally, the garter springs are made of stainless steel.
Preferably, the U-shaped sealing ring of the axial direction is made of polytetrafluoroethylene material.
Further, the other end of the outer shaft is equipped with outward flange, and the outward flange of the outer shaft passes through screw and institute
Liquid trap is stated to be fixedly connected.
Further, elastomeric pad is equipped between the screw and the outward flange of the outer shaft.
Further, the outward flange is equipped with the screw hole radially extended along the pump shaft, and spiral shell is equipped in the screw hole
Nail, to which the internal axle sleeve to be fixed on the pump shaft.
Optionally, the internal axle sleeve and the outer shaft are made of stainless steel.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
An embodiment of the present invention provides a kind of emergent sealing device, which includes：It is fixedly set in pump shaft
On internal axle sleeve, be fixed on liquid trap and be sleeved on pump shaft outer shaft, the coaxially connected adjusting nut on pump shaft with
And carry the bearing of the adjusting nut；Wherein, the inner wall of outer shaft is equipped with axial U-shaped sealing ring, and the inner wall of internal axle sleeve is equipped with
Radial direction seal ring makes one end of internal axle sleeve that the U-shaped sealing ring of the axial direction is pressed on liquid trap, matches by rotating adjusting nut
The radial direction seal ring that internal axle sleeve inner wall is equipped with is closed, to realize emergent sealing.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of emergent sealing device provided in an embodiment of the present invention；
Fig. 2 is the enlarged drawing of the parts H shown in Fig. 1 provided in an embodiment of the present invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
An embodiment of the present invention provides a kind of emergent sealing devices, are suitable for the pump shaft of sealing electric deep well pump.In order to just
In understanding the present invention, below first simply introduce the structure and the course of work of motor-operated well pump.Motor-operated well pump generally comprise motor,
Deck assembly, shafting component, pump head component, motor are arranged in deck assembly on ship deck, shafting component and pump head component
In cargo tank, pump head component is fixed on cargo tank bottom by pump head Support bracket.Wherein, motor passes through with deck assembly
Shaft coupling connects, and shafting component is connect with deck assembly by screwed coupling, and shafting component is joined with pump head component by screw thread
Axis device connects.When motor-operated well pump works, is rotated by motor driving shaft system and drive the wheel rotation in pump head that liquid is situated between
Matter enters liquid trap through liquid goods pipe and transports outward, realizes the extraction of liquid medium.The liquid medium that motor-operated well pump extracts is logical
It is often inflammable and explosive liquid medium, such as liquefied petroleum gas, liquefied natural gas etc., when motor-operated well pump breaks down, needs
It when carrying out demolition and maintenance to it, needs to prevent inflammable and explosive liquid medium from revealing, emergent sealing through the embodiment of the present invention
Device, you can liquid medium is sealed after motor-operated well pump shutdown, prevents its leakage, avoids motor-operated well pump dismounting
It need to greatly reduce maintenance cost into dock and the flammable and combustible liquids medium of cleaning cargo tank, improve dismounting when safeguarding
The convenience of maintenance.
Fig. 1 is a kind of structural schematic diagram of emergent sealing device provided in an embodiment of the present invention, and Fig. 2 is the embodiment of the present invention
The enlarged drawing of the parts H shown in Fig. 1 of offer.As shown in Figure 1 and Figure 2, which includes：It is fixedly set in electronic depth
Internal axle sleeve 21 on the pump shaft 10 of well pump, the outer shaft for being fixed on the liquid trap 30 of motor-operated well pump and being sleeved on pump shaft 10
22, coaxially connected adjusting nut 25 on pump shaft 10 and the bearing 26 of the adjusting nut 25 is carried；The inner wall of outer shaft 22
Axial U-shaped sealing ring 23 is installed and the U-shaped sealing ring 23 of the axial direction is arranged on liquid trap 30, internal axle sleeve 21 is located at outer shaft 22
Interior, the inner wall of internal axle sleeve 21 is equipped with radial direction seal ring 24 and one end of the internal axle sleeve 21 is equipped with outward flange 21b；Adjusting nut 25 is used
In the interval S of adjustment 21 outward flange 21b of internal axle sleeve and one end end face of outer shaft 22, when the outward flange 21b of internal axle sleeve 21 is pressed in
When on one end end face of outer shaft 22, axial U-shaped sealing ring 23 is pressed on liquid trap 30 by the other end of internal axle sleeve 21.
Specifically, adjusting nut 25 is threadedly coupled with pump shaft 10 and is fixed on bearing 26 by screw 25a, bearing 26 with
It is keyed between pump shaft 10, and then when motor-operated well pump work, the adjusting nut 25 and bearing 26 that are fixed on bearing 26 can
To be rotated together with pump shaft 10, in embodiments of the present invention, which can install above deck；When motor-operated well pump is dismantled
When repair, the screw 25a for being fixedly connected between bearing 26 and adjusting nut 25 is unclamped, adjusting nut 25 can be rotated at this time
Realize the relative motion between adjusting nut 25 and pump shaft 10, cooperation pump shaft 10 gravity of itself, pump shaft 10 can be downward
Axial U-shaped sealing ring 23 is pressed on liquid trap 30 by movement up to one end of internal axle sleeve 21, realizes internal axle sleeve 21 and outer shaft
Sealing between 22.
Wherein, the inner wall of outer shaft 22 is equipped with step 22a, and axial U-shaped sealing ring 23 is mounted on step 22a and liquid trap
Between 30, and the sealing lip opening of axial U-shaped sealing ring 23 is arranged towards 10 direction of pump shaft.Axial U-shaped sealing ring 23 and outer shaft
It covers there are certain interference volume between 22 axial directions, which can be that axial U-shaped sealing ring 23 provide initial pressure so that axis
It contacts closely, realizes close between outer shaft 22 and 30 contact interface of liquid trap with liquid trap 30 to the lip of U-shaped sealing ring 23
Envelope.
In addition, in order to which the assembling quality for improving axial U-shaped sealing ring 23 then ensures its performance, it is U-shaped close with axial direction
It answers on the surface (including 21 lower face of 30 upper surface of liquid trap, the surfaces step 22a of outer shaft 22 and internal axle sleeve) that seal 23 contacts
Finish with setting, for example, surface roughness Ra=0.2~0.63 μm.
Further, it is equipped with garter springs 23a in the groove of axial U-shaped sealing ring 23.In embodiments of the present invention, it meets an urgent need
When sealing device acts on, the lower face of internal axle sleeve 21 is pressed on axial U-shaped sealing ring 23, and garter springs 23a is pressurized in turn
Form outside tension so that the lip of axial U-shaped sealing ring 23 increases and close with the lower face contact area of internal axle sleeve 21
Contact, to reinforce the sealing performance of axial U-shaped sealing ring 23.
In embodiments of the present invention, axial U-shaped sealing ring 23 may be used polytetrafluoroethylene material and be made.Polytetrafluoroethylene (PTFE)
With excellent chemical stability and corrosion resistance, the corrosion of low temperature seal liquid medium is can avoid, and then is ensured axial U-shaped
The performance of sealing ring 23.Certainly, axial U-shaped sealing ring 23 can also be made of other materials, and the present invention does not do this
Limitation.
In embodiments of the present invention, the inner wall of internal axle sleeve 21 is equipped with groove 21a, and radial direction seal ring 24 is mounted on the groove
In 21a, the radial direction seal ring 24 is for realizing the sealing between internal axle sleeve 21 and pump shaft 10.Wherein, groove 21a can be according to diameter
It is carried out to the design requirement of sealing ring 24, it is ensured that radial direction seal ring 24 has certain interference between internal axle sleeve 21 and pump shaft 10
Amount, the interference volume are that radial direction seal ring 24 provides initial pressure so that radial direction seal ring 24 and pump shaft 10 and internal axle sleeve 21 are close
Contact realizes sealing performance, and then avoids sealing medium to outward leakage.In order to improve the assembling quality of radial direction seal ring 24 then
Ensure its performance, the surface (including 10 surface of the surface of groove 21a and pump shaft) contacted with radial direction seal ring 24 should have
The finish of setting, for example, surface roughness Ra=0.2~0.63 μm.
In embodiments of the present invention, radial direction seal ring 24 is U-shaped sealing ring.Lock ring is equipped in the groove of the U-shaped sealing ring
Spring 24a.The interference volume that radial direction seal ring 24 is installed can make garter springs 24a compressions form outside tension in turn,
So that the lip of U-shaped sealing ring contacts more closely with 10 surface of pump shaft, reinforce the sealing performance of radial direction seal ring 24.When
So, radial direction seal ring 24 can also use other sealing rings, such as O-ring seal etc..
Similarly, radial direction seal ring 24 can also be made of polytetrafluoroethylene material.Polytetrafluoroethylene (PTFE) has excellent
Chemical stability and corrosion resistance, can avoid the corrosion of low temperature seal liquid medium, and then ensure making for radial direction seal ring 24
Use performance.Certainly, radial direction seal ring 24 can also be made of other materials, and the present invention is without limitation.
Optionally, garter springs 23a and 24a may be used stainless steel material and be made.It is resistance to low due to stainless steel material
Temperature, corrosion resistance are preferable, can avoid the corrosion of low temperature seal liquid medium.
In embodiments of the present invention, the axial spacing and inner shaft of the outward flange 21b of internal axle sleeve 21 and 22 upper surface of outer shaft
It is equal with the axial spacing of axial U-shaped sealing ring 23 to cover 21 lower faces.When the two axial spacing is equal, the weight of shafting acts on
Axial U-shaped sealing ring 23 and outer shaft 22 ensure the axial dimension of axial U-shaped sealing ring 23, avoid shafting total weight direct
It acts on axial U-shaped sealing ring 23, and then ensures the performance of axial U-shaped sealing ring 23 and extend axial U-shaped sealing ring
23 service life.
It should be noted that in embodiments of the present invention, 21 lower face of internal axle sleeve and axis when motor-operated well pump works normally
It is preferably (1.5 ± 0.2) mm to the axial spacing of U-shaped sealing ring 23, since axle-system axial gap is designed by pump head hydraulic performance
Design limitation, axial gap it is excessive or it is too small can cause to rub between each component it is excessive even result in pump shaft 10 rotate it is stuck.
Further, adjusting nut 25 is additionally operable to rotation after the completion of motor-operated well pump demolition and maintenance so that pump shaft 10 is upward
Mobile (1.5 ± 0.2) mm, and then realize the normal work of motor-operated well pump；When motor-operated well pump works normally, under internal axle sleeve 21
The axial spacing of end face and axial U-shaped sealing ring 23 is (1.5 ± 0.2) mm, i.e., when motor-operated well pump works normally, internal axle sleeve 21
It is not contacted with axial U-shaped sealing ring 23, which does not have the function of sealing internal axle sleeve 21 and outer shaft 22.
Further, the other end of outer shaft 22 is equipped with outward flange 22b, and outward flange 22b passes through screw 27 and liquid trap
30 are fixedly connected.In addition, can be equipped with elastomeric pad 28 between outward flange 22b and screw 27, which can add
Big pretightning force can prevent screw 27 from loosening, it is ensured that the fixation between outer shaft 22 and liquid trap 30, so that axial U-shaped close
Seal 23 is fixed on liquid trap 30；In addition, scratching outer shaft 22 when the elastomeric pad 28 can also avoid screw 27 from tightening
Surface.
Further, the outward flange 21b of internal axle sleeve 21 is equipped with the screw hole radially extended along pump shaft 10, is set in the screw hole
There is screw 29, for internal axle sleeve 21 to be fixed on pump shaft 10.When rotating adjusting nut 25 so that pump shaft 10 moves down, Gu
The internal axle sleeve 21 being scheduled on pump shaft 10 can also be moved down with pump shaft 10 until the lower face of internal axle sleeve 21 and axial U-shaped sealing
23 contact of circle and the U-shaped sealing ring of axial direction 23 is pressed on liquid trap 30, and then realizes emergent seal.
Optionally, internal axle sleeve 21 and pump shaft 10 can be clearance fit, be convenient for the installation and dismounting of internal axle sleeve 21.In this hair
It,, can in order to reduce the leakage of sealing medium as far as possible when designing the gap between pump shaft 10 and internal axle sleeve 21 in bright embodiment
To reduce the gap between internal axle sleeve 21 and pump shaft 10 as far as possible；It should be noted that the gap of clearance fit can basis
The case where practical sealing medium, is specifically designed.
Preferably, internal axle sleeve 21 and outer shaft 22 may be used stainless steel material and be made.Stainless steel material has good
Corrosion resistance can avoid the corrosion of low temperature seal medium.
Optionally, screw 25a, 27 and 29 and elastomeric pad 28 may be used stainless steel material and be made.Stainless steel material is resistance to
Corrosive nature is preferable, can avoid the corrosion of low temperature seal medium, and then ensures the fixation between internal axle sleeve 21 and pump shaft 10, outer shaft
Fixation, adjusting nut 25 between set 22 and liquid trap 30 and the fixation between bearing 26.
The foregoing is merely a prefered embodiment of the invention, is not intended to limit the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of emergent sealing device, which is characterized in that be suitable for the pump shaft of sealing electric deep well pump, the emergent sealing device
Including：The internal axle sleeve that is fixedly set on the pump shaft is fixed on the liquid trap of the motor-operated well pump and is sleeved on described
The bearing of outer shaft, coaxially connected adjusting nut and the carrying adjusting nut on the pump shaft on pump shaft；
The inner wall of the outer shaft is equipped with axial U-shaped sealing ring and the U-shaped sealing ring of the axial direction is arranged on the liquid trap,
The internal axle sleeve is located in the outer shaft, and the inner wall of the internal axle sleeve is equipped with radial direction seal ring, and one end of the internal axle sleeve is set
There are outward flange, the adjusting nut to be used to adjust the spacing of the outward flange and one end end face of the outer shaft, when described outer
When flange is pressed on one end end face of the outer shaft, the U-shaped sealing ring of the axial direction is pressed on by the other end of the internal axle sleeve
On the liquid trap.
2. emergent sealing device according to claim 1, which is characterized in that the radial direction seal ring is U-shaped sealing ring.
3. emergent sealing device according to claim 2, which is characterized in that be equipped in the groove of the U-shaped sealing ring tight
Bind round spring.
4. emergent sealing device according to claim 1, which is characterized in that set in the groove of the U-shaped sealing ring of axial direction
There are garter springs.
5. emergent sealing device according to claim 3 or 4, which is characterized in that the garter springs use stainless steel
Material is made.
6. according to the emergent sealing device of claim 1-4 any one of them, which is characterized in that the U-shaped sealing ring of axial direction is adopted
It is made of polytetrafluoroethylene material.
7. according to the emergent sealing device of claim 1-4 any one of them, which is characterized in that the other end of the outer shaft is set
There are outward flange, the outward flange of the outer shaft to be fixedly connected with the liquid trap by screw.
8. emergent sealing device according to claim 7, which is characterized in that the outward flange of the screw and the outer shaft
Between be equipped with elastomeric pad.
9. according to the emergent sealing device of claim 1-4 any one of them, which is characterized in that the outward flange is equipped with along institute
The screw hole of pump shaft radially extended is stated, screw is equipped in the screw hole, to which the internal axle sleeve to be fixed on the pump shaft.
10. being met an urgent need sealing device according to claim 1-4 any one of them, which is characterized in that the internal axle sleeve and described outer
Axle sleeve is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610707738.0A CN106321502B (en) | 2016-08-23 | 2016-08-23 | A kind of emergent sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610707738.0A CN106321502B (en) | 2016-08-23 | 2016-08-23 | A kind of emergent sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106321502A CN106321502A (en) | 2017-01-11 |
| CN106321502B true CN106321502B (en) | 2018-09-25 |
Family
ID=57742108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610707738.0A Active CN106321502B (en) | 2016-08-23 | 2016-08-23 | A kind of emergent sealing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN106321502B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288896A (en) * | 2017-07-31 | 2017-10-24 | 苏州百硕自动化环保设备有限公司 | A kind of small-power deep water pump |
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|---|---|---|---|---|
| DE698901C (en) * | 1935-12-01 | 1940-11-19 | A W Mackensen Maschinenfabrik | Centrifugal pump |
| US2430509A (en) * | 1943-11-06 | 1947-11-11 | Electrical Engineering And Mfg | Shaft seal for submersible pumps |
| CN2184805Y (en) * | 1994-01-14 | 1994-12-07 | 刘毅雄 | Single phase multi-stage non-overload submerged electric pump |
| US6364605B1 (en) * | 2000-08-25 | 2002-04-02 | Corken, Inc. | Regenerative turbine pump |
| CN2493757Y (en) * | 2001-08-10 | 2002-05-29 | 王刚 | Cylinder type power sealing multistage pump |
| CN201083203Y (en) * | 2007-06-13 | 2008-07-09 | 襄樊五二五泵业有限公司 | Intelligence monitoring protecting device for long axis immersible pump |
| CN104696267A (en) * | 2013-12-10 | 2015-06-10 | 中广核工程有限公司 | Method for performing emergency shaft seal on reactor coolant pump as well as shaft seal assembly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5830500A (en) * | 1981-08-15 | 1983-02-22 | Ebara Corp | Fitting structure of pump shaft and impeller |
-
2016
- 2016-08-23 CN CN201610707738.0A patent/CN106321502B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE698901C (en) * | 1935-12-01 | 1940-11-19 | A W Mackensen Maschinenfabrik | Centrifugal pump |
| US2430509A (en) * | 1943-11-06 | 1947-11-11 | Electrical Engineering And Mfg | Shaft seal for submersible pumps |
| CN2184805Y (en) * | 1994-01-14 | 1994-12-07 | 刘毅雄 | Single phase multi-stage non-overload submerged electric pump |
| US6364605B1 (en) * | 2000-08-25 | 2002-04-02 | Corken, Inc. | Regenerative turbine pump |
| CN2493757Y (en) * | 2001-08-10 | 2002-05-29 | 王刚 | Cylinder type power sealing multistage pump |
| CN201083203Y (en) * | 2007-06-13 | 2008-07-09 | 襄樊五二五泵业有限公司 | Intelligence monitoring protecting device for long axis immersible pump |
| CN104696267A (en) * | 2013-12-10 | 2015-06-10 | 中广核工程有限公司 | Method for performing emergency shaft seal on reactor coolant pump as well as shaft seal assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106321502A (en) | 2017-01-11 |
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