CN104405648A - LNG (Liquefied Natural Gas) immersed pump with buffer compensation effect - Google Patents
LNG (Liquefied Natural Gas) immersed pump with buffer compensation effect Download PDFInfo
- Publication number
- CN104405648A CN104405648A CN201410577300.6A CN201410577300A CN104405648A CN 104405648 A CN104405648 A CN 104405648A CN 201410577300 A CN201410577300 A CN 201410577300A CN 104405648 A CN104405648 A CN 104405648A
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- CN
- China
- Prior art keywords
- bearing
- motor
- immersed pump
- lng
- upper bearing
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
-
- 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
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials 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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
Abstract
The invention discloses an LNG (Liquefied Natural Gas) immersed pump with a buffer compensation effect. The end surface of a lower bearing and the end surface of an upper bearing in a pump body are respectively pressed against a motor chamber wall through disc springs. When the LNG immersed pump operates at high frequency, the produced axial force is quite large and the LNG immersed pump is frequency started and stopped. At the moment, the disc springs can play the role of supporting a heavy load, the force born by the lower bearing is reduced and the buffer compensation effect is achieved. At the moment when the LNG immersed pump is started, the whole of a rotor shifts towards the direction of the upper bearing, the upper bearing is prevented from colliding with metal, the upper bearing can be well protected and the service life of the upper bearing is greatly prolonged; since each of the upper bearing and the lower bearing consists of an inner ring, an outer ring, a rolling body and a retainer, the inner rings, the outer rings and the rolling bodies are made of high-carbon chromium deoxidized bearing steel and the retainers are made of low-temperature fluorine-based resin, the wear resistance and low temperature resistance of the bearings at low temperature of LNG are effectively improved, the deformation of the bearings is reduced and the service life of the bearings is prolonged.
Description
Technical field
The invention belongs to technical field of LNG, particularly relate to a kind of LNG immersed pump with buffer compensation effect.
Background technique
LNG is the abbreviation of LNG Liquefied natural gas (liquefied natural gas), and main component is methane.Colourless, tasteless, the nontoxic and non-corrosiveness of LNG, its volume is about with amount gaseous natural gas volume 1/600.Therefore LNG Liquefied natural gas is the effective means of natural gas storing and transport, obtains this year and develops rapidly.
LNG immersed pump be a kind of by Pump and Electromotor integral installation in sealed metal container, zero leakage can be accomplished, avoid producing explosive atmosphere, eliminate the transportation of liquefied natural gas of ignition condition and the core drive output unit of associated low temperature liquid, current independent development needs the key issue solved to comprise: LNG immersed pump electrical equipment is studied, the mainly research of low temp. electric insulating material and cryocable, the Seal Technology Study of electrical connection place, the lubrication technical research of latent liquid type motor and motor low-temperature working characteristic several respects; The LNG immersed pump pump housing is studied, mainly LNG cavitation law study in pump, and low temperature LNG immersed pump impeller and inducer structural design are in optimizing and the research of LNG immersed pump self-balancing mechanism.
Due to low temperature and the inflammable characteristic of LNG, transfer pump not only wants to bear the performance of low temperature, and requires higher to the tightness of pump and electrical safety performance.In addition, in motor lubrication and cooling in low temperature LNG, the pump housing, contingent LNG gasification, rotor and pump housing impeller are jointly by the balance problem etc. that the same axis brings, become the key property that LNG immersed pump is different from the general pump housing, addressing these problems is the key point developing LNG immersed pump.
Along with the high speed development of LNG technology, higher to the functional requirement of LNG liquid addition equipment, therefore determine the characteristic of the necessary constantly consummating function of LNG liquid addition equipment.In starting in a flash, directly and metal bump, the wearing and tearing of upper bearing (metal) are comparatively serious, cause the upper bearing (metal) life-span shorter, have a strong impact on bulk life time and the working efficiency of LNG immersed pump for upper bearing (metal) for existing LNG immersed pump.
Summary of the invention
The invention provides a kind of LNG immersed pump with buffer compensation effect, be intended to solve existing LNG immersed pump in starting in a flash, upper bearing (metal) directly and metal bump, the wearing and tearing of upper bearing (metal) are comparatively serious, cause the upper bearing (metal) life-span shorter, have a strong impact on the bulk life time of LNG immersed pump and the problem of working efficiency.
The object of the present invention is to provide a kind of LNG immersed pump with buffer compensation effect, this LNG immersed pump with buffer compensation effect comprises the pump housing, be provided with cooperatively interact stator and the rotor be placed on rotor shaft in the motor cavity of the described pump housing, described rotor shaft is installed on motor cavity wall by lower bearing and upper bearing (metal); The end face of described lower bearing and the end face of upper bearing (metal) are butted on motor cavity wall respectively by belleville spring, the retainer that upper bearing (metal) and lower bearing are made up of the inner ring adopting high carbon chromium deoxidation Bearing Steel to make, the outer ring adopting high carbon chromium deoxidation Bearing Steel to make, the rolling element adopting high carbon chromium deoxidation Bearing Steel to make, employing low temperature fluoro resin is formed, be provided with retainer and rolling element between described inner ring and outer ring, described rolling element is positioned at described retainer.
Further, described belleville spring is the cone-shaped ring shape structure that the high edge in middle part is low, and the thickness S of wherein said belleville spring is 1.5mm.
Further, described lower bearing and upper bearing (metal) are butted on motor cavity wall respectively by two overlapping belleville springs, towards the inside of motor cavity in the middle part of the evagination of wherein belleville spring, the end face of described lower bearing and the end face of upper bearing (metal) keep out the middle part in belleville spring evagination respectively by block.
Further, the rear end of described motor cavity is connected with motor upper cover, and described upper bearing (metal) is butted on motor by belleville spring and covers; The front end of described motor cavity is connected with motor lower cover, and described lower bearing covers under being butted on motor by belleville spring.
Further, in the sidewall of the described pump housing, be provided with side wall channels, described motor cover the flow liquid passage being provided with and being communicated with side wall channels; The front end of described motor cavity is connected with motor lower cover and housing forms active chamber, described rotor shaft stretches in active chamber, be provided with one-level diversion disk in described active chamber and be divided into ante-chamber and back cavity, described one-level diversion disk is provided with the liquid runner being excessively communicated with ante-chamber and back cavity, described ante-chamber is provided with liquid entering hole, be provided with the inducer be placed on rotor shaft in described liquid entering hole, wherein in ante-chamber, be provided with the one stage impeller be placed on rotor shaft, in described back cavity, be provided with the sencond stage impeller be placed on rotor shaft.
Further, described motor covers the hole for back flow being provided with and being communicated with motor cavity, described hole for back flow will be communicated to the liquid outlet of flow liquid passage in motor cavity.
Further, described belleville spring adopts 60Si2Mn material to make.
The LNG immersed pump with buffer compensation effect provided by the invention, be provided with cooperatively interact stator and the rotor be placed on rotor shaft in the motor cavity of the pump housing, rotor shaft is installed on motor cavity wall by lower bearing and upper bearing (metal), the end face of lower bearing and the end face of upper bearing (metal) are butted on motor cavity wall respectively by belleville spring, this LNG immersed pump is when high frequency is run, the axial force produced is quite large, and this LNG immersed pump start-stop is frequent, now belleville spring can play the effect of supporting heavy load, decrease the bearing capacity of lower bearing, play buffer compensation effect simultaneously, in starting in a flash, rotor entirety is toward upper bearing (metal) direction play to this LNG immersed pump, avoids upper bearing (metal) directly and metal bump, can protect upper bearing (metal) well, the life-span of upper bearing (metal) is extended greatly, upper bearing (metal) and lower bearing are by the inner ring adopting high carbon chromium deoxidation Bearing Steel to make, adopt the outer ring that high carbon chromium deoxidation Bearing Steel is made, the rolling element adopting high carbon chromium deoxidation Bearing Steel to make and the retainer adopting low temperature fluoro resin to make are formed, retainer and rolling element is provided with between inner ring and outer ring, rolling element is positioned at retainer, effectively improve the wear resistance of LNG low temperature lower bearing, lower temperature resistance, reduce the distortion of bearing, guarantee bearing at work play be in normal range (NR), add the working life of bearing, add the life-span of pump entirety simultaneously, there is stronger popularization and using value.
Accompanying drawing explanation
Fig. 1 is the structural representation with buffer compensation effect LNG immersed pump that the embodiment of the present invention provides;
Fig. 2 is enlarged view behind the local of in Fig. 1 I;
Fig. 3 is enlarged view behind the local of in Fig. 1 II;
Fig. 4 is the structural representation of the belleville spring that the embodiment of the present invention provides;
Fig. 5 is the sectional view of Fig. 4.
In figure: 1, lower bearing; 2, upper bearing (metal); 3, liquid entering hole; 4, inducer; 5, one stage impeller; 6, one-level diversion disk; 7, sencond stage impeller; 8, side wall channels; 9, flow liquid passage; 10, motor upper cover; 11, stator; 12, rotor shaft; 13, belleville spring; 14, motor lower cover; 15, lower sleeve gasket; 16, upper sleeve gasket; 17, hole for back flow.
Embodiment
In order to make object of the present invention, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is described in further detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and be not used in restriction invention.
Fig. 1 shows the structure with the LNG immersed pump of buffer compensation effect that the embodiment of the present invention provides.For convenience of explanation, illustrate only part related to the present invention.
The object of the present invention is to provide a kind of LNG immersed pump with buffer compensation effect, this LNG immersed pump with buffer compensation effect comprises the pump housing, be provided with cooperatively interact stator 11 and the rotor be placed on rotor shaft 12 in the motor cavity of the described pump housing, described rotor shaft 12 is installed on motor cavity wall by lower bearing 1 and upper bearing (metal) 2; The end face of described lower bearing 1 and the end face of upper bearing (metal) 2 are butted on motor cavity wall respectively by belleville spring 13, the retainer that upper bearing (metal) 2 and lower bearing 1 are made up of the inner ring adopting high carbon chromium deoxidation Bearing Steel to make, the outer ring adopting high carbon chromium deoxidation Bearing Steel to make, the rolling element adopting high carbon chromium deoxidation Bearing Steel to make, employing low temperature fluoro resin is formed, be provided with retainer and rolling element between described inner ring and outer ring, described rolling element is positioned at described retainer.
In embodiments of the present invention, described belleville spring 13 is the cone-shaped ring shape structure that the high edge in middle part is low, and the thickness S of wherein said belleville spring 13 is 1.5mm.
In embodiments of the present invention, described lower bearing 1 and upper bearing (metal) 2 are butted on motor cavity wall respectively by two overlapping belleville springs 13, towards the inside of motor cavity in the middle part of the evagination of wherein belleville spring 13, the end face of described lower bearing 1 and the end face of upper bearing (metal) 2 keep out the middle part in belleville spring 13 evagination respectively by block.
In embodiments of the present invention, the rear end of described motor cavity is connected with motor upper cover 10, and described upper bearing (metal) 2 is butted on motor upper cover 10 by belleville spring 13; The front end of described motor cavity is connected with motor lower cover 14, and described lower bearing 1 is butted on motor lower cover 14 by belleville spring 13.
In embodiments of the present invention, be provided with side wall channels 8 in the sidewall of the described pump housing, described motor upper cover 10 is provided with the flow liquid passage 9 be communicated with side wall channels 8; The front end of described motor cavity is connected with motor lower cover 14 and forms active chamber with housing, described rotor shaft 12 stretches in active chamber, be provided with one-level diversion disk 6 in described active chamber and be divided into ante-chamber and back cavity, described one-level diversion disk 6 is provided with the liquid runner being excessively communicated with ante-chamber and back cavity, described ante-chamber is provided with liquid entering hole 3, the inducer 4 be placed on rotor shaft 12 is provided with in described liquid entering hole 3, wherein be provided with the one stage impeller 5 be placed on rotor shaft 12 in ante-chamber, in described back cavity, be provided with the sencond stage impeller 7 be placed on rotor shaft 12.
In embodiments of the present invention, described motor upper cover 10 is provided with the hole for back flow 17 being communicated with motor cavity, and described hole for back flow 17 will be communicated to the liquid outlet of flow liquid passage 9 in motor cavity.
In embodiments of the present invention, described belleville spring 13 adopts 60Si2Mn material to make.
Below in conjunction with drawings and the specific embodiments, application principle of the present invention is further described.
As shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the LNG immersed pump being provided with belleville spring 13 provided by the invention, comprise the pump housing, be provided with cooperatively interact stator 11 and the rotor be placed on rotor shaft 12 in the motor cavity of the pump housing, rotor shaft 12 is installed on motor cavity wall by lower bearing 1 and upper bearing (metal) 2; The end face of lower bearing 1 and the end face of upper bearing (metal) 2 are butted on motor cavity wall respectively by belleville spring 13.
Owing to have employed said structure; this LNG immersed pump is when high frequency is run; the axial force produced is quite large, and rotor entirety is toward upper bearing (metal) 2 direction play, and this LNG immersed pump start-stop is frequent; now belleville spring 13 can play the effect of supporting heavy load; decrease the bearing capacity of lower bearing 1, play buffer compensation effect simultaneously, avoid upper bearing (metal) 2 directly and metal bump; can well protect upper bearing (metal) 2, the life-span of upper bearing (metal) 2 is extended greatly.
The LNG immersed pump being provided with belleville spring 13 provided by the invention, belleville spring 13 is the cone-shaped ring shape structure that the high edge in middle part is low, and wherein the thickness S of belleville spring 13 is 1.5mm.
Owing to have employed said structure, belleville spring 13 designs with the circular ring of taper, makes belleville spring 13 energy supporting heavy load, and is out of shape and presses also highly little; If the thickness of belleville spring 13 is larger, then its spring-back force is less, the effect of the bearing capacity reducing lower bearing 1 can not be played, if the thickness of belleville spring 13 is less, then its distortion is too large, crush easily, therefore the selection of material thickness, be also through meticulous calculating and repeatedly strong loaded low temperature test demonstration.
The LNG immersed pump being provided with belleville spring 13 provided by the invention, lower bearing 1 and upper bearing (metal) 2 are butted on motor cavity wall respectively by two overlapping belleville springs 13, towards the inside of motor cavity in the middle part of the evagination of wherein belleville spring 13, the end face of lower bearing 1 and the end face of upper bearing (metal) 2 keep out the middle part in belleville spring 13 evagination respectively by block.
Owing to have employed said structure; adopt the mode of two panels belleville spring 13 superimposed combination and to arrangement, now belleville spring 13 can play buffer compensation effect, avoid upper bearing (metal) 2 directly and metal bump; can well protect upper bearing (metal) 2, the life-span of upper bearing (metal) 2 is extended greatly.
The LNG immersed pump being provided with belleville spring 13 provided by the invention, the rear end of motor cavity is connected with motor upper cover 10, and upper bearing (metal) 2 is butted on motor upper cover 10 by belleville spring 13; The front end of motor cavity is connected with motor lower cover 14, and lower bearing 1 is butted on motor lower cover 14 by belleville spring 13.
Owing to have employed said structure, motor lower cover 14 and motor upper cover 10 are connected to the rear and front end of motor cavity, thus are convenient to the installation of belleville spring 13 and motor internal part.
The LNG immersed pump being provided with belleville spring 13 provided by the invention, is provided with side wall channels 8 in the sidewall of the pump housing, motor upper cover 10 is provided with the flow liquid passage 9 be communicated with side wall channels 8; The front end of motor cavity is connected with motor lower cover 14 and forms active chamber with housing, rotor shaft 12 stretches in active chamber, be provided with one-level diversion disk 6 in active chamber and be divided into ante-chamber and back cavity, one-level diversion disk 6 is provided with the liquid runner being excessively communicated with ante-chamber and back cavity, ante-chamber is provided with liquid entering hole 3, be provided with the inducer 4 be placed on rotor shaft 12 in liquid entering hole 3, wherein in ante-chamber, be provided with the one stage impeller 5 be placed on rotor shaft 12, in back cavity, be provided with the sencond stage impeller 7 be placed on rotor shaft 12.
Owing to have employed said structure, stator 11 coil winding can be rotated by rotor driven axle 12, for whole LNG immersed pump provides power source, rotor shaft 12 drives one stage impeller 5 and inducer 4 to rotate simultaneously, thus can LNG be drawn into LNG immersed pump from liquid entering hole 3, first being induced wheel 4 is drawn in ante-chamber, first time supercharging can be realized by one stage impeller 5 through rotating, LNG after supercharging can enter into back cavity from the runner hole one-level diversion disk 6, second time supercharging is carried out again by the sencond stage impeller 7 in back cavity, the LNG in back cavity is made to have higher pressure, hydrodynamic pressure after LNG immersed pump is increased, back cavity and side wall channels 8 are communicated to flow liquid passage 9, and flow liquid passage 9 is pooled to same liquid outlet and LNG can be discharged from liquid outlet.
Owing to have employed said structure, liquid pass hole object is to allow a little liquid by hole for back flow 17, the bearing in lubrication and cooling LNG immersed pump, can also clear up inner impurity.Because LNG immersed pump is when high-frequency operation, bearing is at High Rotation Speed, the heat produced is also quite large, so the cooling of liquid must must be had, by the design of hole for back flow 17, bearing is cooled and lubricates, substantially increase the working life of bearing, bearing is also the easily damaged parts inside pump component, and the life-span of easily damaged parts improves, therefore the life-span of pump also increases accordingly.Meanwhile, how much work that pump is accumulating over a long period, also can accumulate some impurity inside bearing rear chamber, therefore hole for back flow 17 is designed with, liquid wash bearing rear chamber, makes the space around bearing remain neat and tidy, also substantially increases the working life of bearing from this angle.
The LNG immersed pump being provided with belleville spring 13 provided by the invention, belleville spring 13 adopts 60Si2Mn material to make.
Owing to have employed said structure, belleville spring 13 designs with cone-shaped ring shape structure, make belleville spring 13 energy supporting heavy load, and be out of shape and press also highly little, and 60Si2Mn at low ambient temperatures, the mechanical property of this material can not be lost, thus guarantee that belleville spring 13 at low ambient temperatures, can have good elasticity.
Upper bearing (metal) 2 and the lower bearing 1 with the LNG immersed pump of buffer compensation effect provided by the invention, comprise inner ring, outer ring, rolling element and retainer, retainer and rolling element is provided with between inner ring and outer ring, rolling element is positioned at retainer, inner ring, outer ring and rolling element all adopt high carbon chromium deoxidation Bearing Steel to make, and retainer adopts low temperature fluoro resin to make.
The LNG low temperature immersed contrifugal pump of the retainer be made up of low temperature fluoro resin, the wear resistance of LNG low temperature lower bearing 1 can be improved, lower temperature resistance, reduce the distortion of bearing, guarantee bearing at work play be in normal range (NR), add the working life of bearing, add the life-span of pump entirety simultaneously.This bearing low temperature resistantly can reach-200 DEG C, and bearing rolls that ditch surface hardness is high, and bearing deformation is little, and under high speed rotating, noise is little, and low temperature fluoro resin band self-lubricating function, therefore ensure that the working life of this immersed pump.
The LNG immersed pump of buffer compensation effect that what the embodiment of the present invention provided have, be provided with cooperatively interact stator 11 and the rotor that is placed on rotor shaft 12 in the motor cavity of the pump housing, rotor shaft 12 is installed on motor cavity wall by lower bearing 1 and upper bearing (metal) 2, the end face of lower bearing 1 and the end face of upper bearing (metal) 2 are butted on motor cavity wall respectively by belleville spring 13, this LNG immersed pump is when high frequency is run, the axial force produced is quite large, and this LNG immersed pump start-stop is frequent, now belleville spring 13 can play the effect of supporting heavy load, decrease the bearing capacity of lower bearing 1, play buffer compensation effect simultaneously, in starting in a flash, rotor entirety is toward upper bearing (metal) direction play to this LNG immersed pump, avoids upper bearing (metal) 2 directly and metal bump, can protect upper bearing (metal) 2 well, the life-span of upper bearing (metal) 2 is extended greatly, upper bearing (metal) 2 and lower bearing 1 are by the inner ring adopting high carbon chromium deoxidation Bearing Steel to make, adopt the outer ring that high carbon chromium deoxidation Bearing Steel is made, the rolling element adopting high carbon chromium deoxidation Bearing Steel to make and the retainer adopting low temperature fluoro resin to make are formed, retainer and rolling element is provided with between inner ring and outer ring, rolling element is positioned at retainer, effectively improve the wear resistance of LNG low temperature lower bearing 1, lower temperature resistance, reduce the distortion of bearing, guarantee bearing at work play be in normal range (NR), add the working life of bearing, add the life-span of pump entirety simultaneously, there is stronger popularization and using value.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. one kind has the LNG immersed pump of buffer compensation effect, it is characterized in that, this LNG immersed pump with buffer compensation effect comprises the pump housing, be provided with cooperatively interact stator and the rotor be placed on rotor shaft in the motor cavity of the described pump housing, described rotor shaft is installed on motor cavity wall by lower bearing and upper bearing (metal); The end face of described lower bearing and the end face of upper bearing (metal) are butted on motor cavity wall respectively by belleville spring, the retainer that upper bearing (metal) and lower bearing are made up of the inner ring adopting high carbon chromium deoxidation Bearing Steel to make, the outer ring adopting high carbon chromium deoxidation Bearing Steel to make, the rolling element adopting high carbon chromium deoxidation Bearing Steel to make, employing low temperature fluoro resin is formed, be provided with retainer and rolling element between described inner ring and outer ring, described rolling element is positioned at described retainer.
2. have the LNG immersed pump of buffer compensation effect as claimed in claim 1, it is characterized in that, described belleville spring is the cone-shaped ring shape structure that the high edge in middle part is low, and the thickness S of wherein said belleville spring is 1.5mm.
3. there is the LNG immersed pump of buffer compensation effect as claimed in claim 1, it is characterized in that, described lower bearing and upper bearing (metal) are butted on motor cavity wall respectively by two overlapping belleville springs, towards the inside of motor cavity in the middle part of the evagination of wherein belleville spring, the end face of described lower bearing and the end face of upper bearing (metal) keep out the middle part in belleville spring evagination respectively by block.
4. have the LNG immersed pump of buffer compensation effect as claimed in claim 1, it is characterized in that, the rear end of described motor cavity is connected with motor upper cover, and described upper bearing (metal) is butted on motor by belleville spring and covers; The front end of described motor cavity is connected with motor lower cover, and described lower bearing covers under being butted on motor by belleville spring.
5. there is the LNG immersed pump of buffer compensation effect as claimed in claim 1, it is characterized in that, in the sidewall of the described pump housing, be provided with side wall channels, described motor covers the flow liquid passage being provided with and being communicated with side wall channels; The front end of described motor cavity is connected with motor lower cover and housing forms active chamber, described rotor shaft stretches in active chamber, be provided with one-level diversion disk in described active chamber and be divided into ante-chamber and back cavity, described one-level diversion disk is provided with the liquid runner being excessively communicated with ante-chamber and back cavity, described ante-chamber is provided with liquid entering hole, be provided with the inducer be placed on rotor shaft in described liquid entering hole, wherein in ante-chamber, be provided with the one stage impeller be placed on rotor shaft, in described back cavity, be provided with the sencond stage impeller be placed on rotor shaft.
6. have the LNG immersed pump of buffer compensation effect as claimed in claim 4, it is characterized in that, described motor covers the hole for back flow being provided with and being communicated with motor cavity, described hole for back flow will be communicated to the liquid outlet of flow liquid passage in motor cavity.
7. have the LNG immersed pump of buffer compensation effect as claimed in claim 1, it is characterized in that, described belleville spring adopts 60Si2Mn material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410577300.6A CN104405648A (en) | 2014-10-24 | 2014-10-24 | LNG (Liquefied Natural Gas) immersed pump with buffer compensation effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410577300.6A CN104405648A (en) | 2014-10-24 | 2014-10-24 | LNG (Liquefied Natural Gas) immersed pump with buffer compensation effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104405648A true CN104405648A (en) | 2015-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410577300.6A Pending CN104405648A (en) | 2014-10-24 | 2014-10-24 | LNG (Liquefied Natural Gas) immersed pump with buffer compensation effect |
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| CN (1) | CN104405648A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422467A (en) * | 2015-11-25 | 2016-03-23 | 湖南耐普泵业股份有限公司 | Magnetic driving pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10318179A (en) * | 1997-05-21 | 1998-12-02 | Hitachi Ltd | Submerged pump for liquefied gas tank |
| EP0990800A1 (en) * | 1998-10-01 | 2000-04-05 | Ingersoll-Dresser Pump Company | Forced closed-loop cooling for a submersible pump motor |
| CN203532276U (en) * | 2013-11-08 | 2014-04-09 | 成都安迪生测量有限公司 | LNG submersible pump with disc spring |
| CN203548252U (en) * | 2013-11-08 | 2014-04-16 | 成都安迪生测量有限公司 | LNG immersed pump |
| CN203548306U (en) * | 2013-11-08 | 2014-04-16 | 成都安迪生测量有限公司 | Bearing of LNG immersed pump and LNG immersed pump using same |
-
2014
- 2014-10-24 CN CN201410577300.6A patent/CN104405648A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10318179A (en) * | 1997-05-21 | 1998-12-02 | Hitachi Ltd | Submerged pump for liquefied gas tank |
| EP0990800A1 (en) * | 1998-10-01 | 2000-04-05 | Ingersoll-Dresser Pump Company | Forced closed-loop cooling for a submersible pump motor |
| CN203532276U (en) * | 2013-11-08 | 2014-04-09 | 成都安迪生测量有限公司 | LNG submersible pump with disc spring |
| CN203548252U (en) * | 2013-11-08 | 2014-04-16 | 成都安迪生测量有限公司 | LNG immersed pump |
| CN203548306U (en) * | 2013-11-08 | 2014-04-16 | 成都安迪生测量有限公司 | Bearing of LNG immersed pump and LNG immersed pump using same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422467A (en) * | 2015-11-25 | 2016-03-23 | 湖南耐普泵业股份有限公司 | Magnetic driving pump |
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Application publication date: 20150311 |