CN108457894A - Efficient non-leakage canned motor pump - Google Patents
Efficient non-leakage canned motor pump Download PDFInfo
- Publication number
- CN108457894A CN108457894A CN201810549073.4A CN201810549073A CN108457894A CN 108457894 A CN108457894 A CN 108457894A CN 201810549073 A CN201810549073 A CN 201810549073A CN 108457894 A CN108457894 A CN 108457894A
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- Prior art keywords
- sealing
- leakage
- gas
- canned motor
- efficient non
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- 238000007789 sealing Methods 0.000 claims abstract description 132
- 230000005540 biological transmission Effects 0.000 claims abstract description 56
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 239000007789 gas Substances 0.000 claims description 98
- 239000007788 liquid Substances 0.000 claims description 50
- 238000005192 partition Methods 0.000 claims description 33
- 238000001514 detection method Methods 0.000 claims description 30
- 239000002184 metal Substances 0.000 claims description 26
- 238000001816 cooling Methods 0.000 claims description 24
- 239000012530 fluid Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 239000003570 air Substances 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 230000003068 static effect Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 231100000614 poison Toxicity 0.000 description 3
- 230000007096 poisonous effect Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
- F04D29/108—Shaft sealings especially adapted for liquid pumps the sealing fluid being other than the working liquid or being the working liquid treated
-
- 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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
Abstract
The present invention provides a kind of efficient non-leakage canned motor pumps, including：Transmission shaft；Delivery pump, is arranged the first end in transmission shaft, and delivery pump includes the work department for the first end for being connected to transmission shaft；Driving mechanism is arranged the second end in transmission shaft and is drivingly connected with transmission shaft；Sealing is set in the outside of transmission shaft, and one end of sealing is connect with delivery pump air-tightness, and sealing forms seal chamber in the outside of transmission shaft, in seal chamber there is gas to block up chamber.It applies the technical scheme of the present invention, efficient non-leakage canned motor pump on the outside of transmission shaft by being arranged sealing, seal chamber is established between delivery pump and the external world, and it forms gas and blocks up chamber, to improve the sealing performance of efficient non-leakage canned motor pump, and the structure of efficient non-leakage canned motor pump is simpler compared to existing canned motor pump, and sliding bearing, the efficiency of canned pump need not be used also to be improved.
Description
Technical field
The present invention relates to pumping unit fields, in particular to a kind of efficient non-leakage canned motor pump.
Background technology
In the prior art, the pump with sealing effect is divided into static seal pump and dynamic sealing pump, wherein canned motor pump and magnetic drive pump
Belong to static seal pump, centrifugal pump, mixed-flow pump and positive displacement pump then belong to dynamic sealing pump.
Existing dynamic sealing pump has the following problems：
1, it can not accomplish complete No leakage, be not suitable for the inflammable and explosive medium of conveying, poisonous and harmful medium, strong corrosive media
And valuable medium etc..
2, the service life of mechanical seal is limited, and needs cooling flushing, if bad seals, it will and cause pump to reveal,
When entrance negative pressure operating mode, pump chamber is collaborated with outside air, can destroy pump chamber suction side negative pressure operating status, and formation moment is fallen
Pump, causes aneroid to dally, and in addition to pumping and damaging, there is also serious security risks.Such as poisonous medium, inflammable medium leak and cause
Casualties, equipment explosion accident are commonplace, are operated without medium after seal leakage causes pump and cause to pump locking parking,
Even the accident of explosion is also frequent occurrence.
3, there are various problems, such as seal face abrasion, hot tearing, deformation easily occurs for mechanical seal；Elastic element is easily loose
It relaxes, be broken, aging；At axle sleeve and seal ring of moving ring, there are leakage points at seal face；Easily there is stress deformation in Long-time Shut-down
Lead to seal failure, dismounting is needed to overhaul before use；When sealing the media such as high temperature, burn into slurry, volatile, service life is short；It is non-
End face cannot have foreign matters to have dust that cannot have scuffing when packaging sealing installation；Mating lubrication rinse-system takes up an area face
Product increases, and maintenance cost is high；The post-processing of generation accident is difficult.
4, in transporting slurry, since medium abrasion is strong, cause mechanical seal service life extremely short.
5, the bearing of dynamic sealing pump needs lubricating oil (fat) to be lubricated, and otherwise will cause bearing damage.
Existing static seal pump has the following problems：
1, it is not suitable for frequent start-stop, otherwise will causes bearing service life serious curtailment.
2, realizability energy range is limited.Be only applicable to range of viscosities 0.1-20cp medium, and there is presently no
The canned motor pump and magnetic drive pump of super high power.
3, the existing static seal efficiency of pump is low, causes energy waste；Canned motor pump is that motor and pump are integrally formed, stator and turn
The inner surface of son is equipped with the stator and rotor housing that sheet metal is made, in addition in respective side metallic plate and their welding
It seals, to make stator and rotor core not by etch, due to the presence of stator and rotor housing, between increasing between stator and rotor
Gap makes the efficiency of shield electric machine be less than common electric machine, and metallic shield is sleeved on the movement that cutting magnetic line can be done when pump operating,
Eddy current is induced, eddy current loss is generated, to reduce efficiency；Magnetic drive pump is to utilize magnetic coupling passing power, when electronic
When machine drives the outer magnet rotor rotation of magnetic coupling, the magnetic line of force passes through gap and separation sleeve, acts on interior magnet rotor, realizes
Power transmits, when inside and outside magnet rotor rotates, since magnetic direction and size change at any time according to certain rules, from
And the magnetic flux also time to time change for making metal be isolated in jacket wall shell, eddy current will be generated as conductor, causes eddy current loss,
Transmission efficiency is set to substantially reduce.
4, existing static seal pump uses sliding bearing, and sliding bearing service life is shorter, causes bearing replacing all
Phase is short.
Due to the above problem existing for existing pump class product, there are serious safety when being used in the every field of application
Hidden danger increases maintenance cost, parts replacement cost, and there are problems that waste of energy.
Invention content
The main purpose of the present invention is to provide a kind of efficient non-leakage canned motor pumps, to solve shielding in the prior art
The problem of the shield effectiveness deficiencies such as pump, magnetic drive pump and centrifugation mixed-flow pump.
To achieve the goals above, the present invention provides a kind of efficient non-leakage canned motor pumps, including：Transmission shaft；Delivery pump,
First end in transmission shaft is set, and delivery pump includes the work department for the first end for being connected to transmission shaft；Driving mechanism, setting are passing
The second end of moving axis and with transmission shaft be drivingly connected；Sealing is set in the outside of transmission shaft, one end of sealing and delivery pump
Air-tightness connects, and sealing forms seal chamber in the outside of transmission shaft, in seal chamber there is gas to block up chamber.
Further, sealing includes：Gas blocks up seal sleeve, and gas blocks up one end of seal sleeve and delivery pump air-tightness connects
It connects, gas blocks up in seal sleeve, and there is gas to block up chamber；Motor shroud sleeve, one end and the gas of motor shroud sleeve block up the another of seal sleeve
One end connects, and driving mechanism is arranged in motor shroud sleeve.
Further, sealing further includes partition board portion, and partition board portion is arranged blocks up seal sleeve and motor shroud sleeve in gas
At link position, the inner cavity that gas blocks up seal sleeve is connected to the inner cavity of motor shroud sleeve.
Further, efficient non-leakage canned motor pump further includes pressurizing pack, and pressurizing pack is placed in gas and blocks up in seal sleeve, when
When pumped medium is entered in the stifled seal sleeve of gas, pressurizing pack makes Jie by improving the pressure that gas blocks up in seal sleeve above medium
Matter height maintains certain range.
Further, pressurizing pack includes the first liquid level detection device and the second liquid level detection device；Pumped medium enters
After gas blocks up in seal sleeve, when the first liquid level detection device senses medium, the solenoid valve on compressed air tunnel is opened
It opens, is blocked up to gas and convey compressed air in seal sleeve, the pressure of compressed air is more than pressure medium at axle envelope, under medium liquid level
Drop；When medium liquid level drops to the second liquid level detection device, when the induction of the second liquid level detection device is less than medium, compressed air is defeated
It send the solenoid valve on pipeline to close, stops the input of compressed air.
Further, pressurizing pack further includes third liquid level detection device；When medium liquid level is filled less than third level sensing
It sets, when the induction of third liquid level detection device is less than medium, the solenoid valve on relief pipeline is opened, and compressed air passes through relief pipeline
Discharge, medium liquid level are begun to ramp up；When the second liquid level detection device senses the medium of rising, the solenoid valve on relief pipeline
It closes, stops the discharge of compressed air.
Further, sealing further includes first sealing device, and first sealing device is arranged in partition board portion and transmission shaft
Junction.
Further, sealing further includes sealing partition board, and sealing partition board setting is blocked up in gas in seal sleeve, and sealing partition board will
The inner cavity that gas blocks up seal sleeve is divided into the first chamber close to driving mechanism and the second chamber close to delivery pump, and the second chamber is stifled for gas
Chamber, the first chamber are connected to the inner cavity of motor shroud sleeve.
Further, efficient non-leakage canned motor pump further includes the first air inlet and the first gas outlet, the first air inlet and
One gas outlet is connect with the second chamber.
Further, efficient non-leakage canned motor pump further includes the second air inlet and/or the second gas outlet, the second air inlet with
First chamber connects, and the second gas outlet is connect with the first chamber.
Further, efficient non-leakage canned motor pump further includes return duct, and one end and the gas of return duct block up chamber and connect, return duct
The other end and delivery pump arrival end connect.
Further, efficient non-leakage canned motor pump is horizontal pump, and efficient non-leakage canned motor pump further includes the second sealing device；
Second sealing device is arranged at the link position that gas blocks up seal sleeve and delivery pump, for preventing the medium in delivery pump from entering
Gas blocks up in seal sleeve；Gas blocks up intracavitary and is provided with pressure sensor and/or liquid level sensor.
Further, the bottom of the stifled chamber of gas is provided with leakage fluid dram.
Further, efficient non-leakage canned motor pump further includes：The lower bearing component and upper bearing portion being arranged on transmission shaft
Part；The sealing other end passes through upper bearing (metal) component and transmission axis connection；The first sealing is provided on lower bearing component；Sealing,
First annular seal space is formed between first sealing and delivery pump, first annular seal space is that gas blocks up chamber；Sealing, the first sealing and upper bearing (metal)
The second cavity is formed between component, the second chamber is filled with sealing fluid.
Further, efficient non-leakage canned motor pump further includes：Second sealing, is arranged in the top of upper bearing (metal) component, first
The second seal chamber is formed between sealing, the second sealing, sealing.
Further, efficient non-leakage canned motor pump further includes：The connection in transmission shaft and driving mechanism is arranged in cooling fan
At position, and driven by driving mechanism；Cooling coil, one end are connected to the bottom of the first sealing and are connected to the second cavity, separately
One end is connected on the outer rim partition board of upper bearing (metal) component and is connected to the second cavity, and a part for cooling coil, which surrounds, to be arranged cold
But the outside of fan forms coil pipe portion.
Further, first annular seal space and/or the second seal chamber are interior filled with nitrogen, inert gas or air.
It applies the technical scheme of the present invention, efficient non-leakage canned motor pump on the outside of transmission shaft by being arranged sealing, defeated
It send and establishes seal chamber between pump and the external world, and form gas and block up chamber, to improve the sealing performance of efficient non-leakage canned motor pump, and
The structure of efficient non-leakage canned motor pump is simpler compared to existing canned motor pump, need not use sliding bearing, the effect of canned pump
Rate is also improved.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows the structural schematic diagram of the first embodiment of efficient non-leakage canned motor pump according to the present invention；
Fig. 2 shows the structural schematic diagrams of second of embodiment of efficient non-leakage canned motor pump according to the present invention；
Fig. 3 shows the structural schematic diagram of the third embodiment of efficient non-leakage canned motor pump according to the present invention；
Fig. 4 shows the structural schematic diagram of the 4th kind of embodiment of efficient non-leakage canned motor pump according to the present invention；
Fig. 5 shows the structural schematic diagram of the 5th kind of embodiment of efficient non-leakage canned motor pump according to the present invention；
Fig. 6 shows the structural schematic diagram of the 6th kind of embodiment of efficient non-leakage canned motor pump according to the present invention；
Fig. 7 shows the structural schematic diagram of the 7th kind of embodiment of efficient non-leakage canned motor pump according to the present invention.
Wherein, above-mentioned attached drawing includes the following drawings label：
10, transmission shaft；20, delivery pump；21, back blades；22, throat bushing；30, driving mechanism；31, motor；32, motor branch
Frame；40, upper cover；41, upper cover air inlet；42, upper cover exhaust outlet；130, gas blocks up seal sleeve；131, the first air inlet；132,
One gas outlet；133, the second air inlet；134, the second gas outlet；135, leakage fluid dram；140, motor shroud sleeve；141, the first liquid
Level detecting apparatus；142, the second liquid level detection device；143, third liquid level detection device；144, compressed air tunnel；
145, relief pipeline；151, partition board portion；152, retaining ring；160, partition board is sealed；161, first sealing device；170, return duct；
180, the second sealing device；190, cooling cover；191, coolant inlet；192, cooling liquid outlet；101, the first chamber；102,
Two chambers；230, lower bearing component；231, lower bearing；232, the first sealing；240, upper bearing (metal) component；241, upper bearing (metal)；242, on
Gland；243, bearing body；260, the second sealing；281, cooling coil；282, cooling fan；201, first annular seal space；202,
Two cavitys；203, the second seal chamber；204, cooling sap cavity.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
For ease of description, herein can with use space relative terms, as " ... on ", " in ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, if the device in attached drawing is squeezed, it is described as " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (be rotated by 90 ° or be in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
This application provides a kind of efficient non-leakage canned motor pumps, as shown in Figures 1 to 7, the efficient non-leakage canned motor pump packet
It includes：Transmission shaft 10；Delivery pump 20, is arranged the first end in transmission shaft 10, and delivery pump 20 includes being connected to the first of transmission shaft 10
The work department at end；Driving mechanism 30 is arranged the second end in transmission shaft 10 and is drivingly connected with transmission shaft 10；Sealing is arranged
In the outside of transmission shaft 10, one end of sealing is connect with 20 air-tightness of delivery pump, and sealing is in the outside shape of transmission shaft 10
At seal chamber, in seal chamber there is gas to block up chamber.
The efficient non-leakage canned motor pump of the application in 10 outside of transmission shaft by being arranged sealing, in delivery pump 20 and the external world
Between establish seal chamber, and formed gas block up chamber, to improve the sealing performance of efficient non-leakage canned motor pump, and efficient non-leakage
The structure of canned motor pump is simpler compared to existing canned motor pump, and sliding bearing, the efficiency of canned pump need not be used also to be carried
It is high.
Preferably, efficient non-leakage canned motor pump includes air inlet and exhaust outlet, and air inlet and exhaust outlet block up chamber company with gas
Logical, when the density that gas blocks up intracavitary institute inflatable body is more than air, the horizontal position of air inlet is less than the horizontal position of exhaust outlet.
Gas blocks up intracavitary can be with inflated with nitrogen or inert gas, when especially pumping flammable or other danger mediums, and gas blocks up chamber
Effect is exactly by medium and air insulated.When conveying non-hazardous general medium, gas, which blocks up intracavitary, can also fill air, at this time gas
The main function of stifled chamber is sealing delivery pump 20.
Preferably, in the embodiment as shown in Fig. 1 to Fig. 5, sealing includes：Gas blocks up seal sleeve 130, the stifled sealing of gas
One end of sleeve 130 is connect with 20 air-tightness of delivery pump, and gas blocks up in seal sleeve 130, and there is gas to block up chamber；Motor shroud sleeve
140, the other end that one end of motor shroud sleeve 140 blocks up seal sleeve 130 with gas connect, and the setting of driving mechanism 30 is in motor screen
It covers in sleeve 140.
In these embodiments, driving mechanism 30 include the stator being connect with the main body of efficient non-leakage canned motor pump and with biography
The rotor that moving axis 10 connects, stator and rotor are arranged in the cavity of the formation of motor shroud sleeve 140, are let out with improving efficiently nothing
Leak the closed shield effect of canned motor pump.
Preferably, sealing further includes partition board portion 151, and the setting of partition board portion 151 blocks up seal sleeve 130 and motor shielding in gas
At the link position of sleeve 140, the inner cavity that gas blocks up seal sleeve 130 is connected to the inner cavity of motor shroud sleeve 140.
Partition board portion 151 is used to separate the cavity of the gentle stifled seal sleeve of cavity 130 of motor shroud sleeve 140, and can
It is splashed into the cavity of motor shroud sleeve 140 with the liquid medium for preventing gas from blocking up in the cavity of seal sleeve 130.
The inner cavity that gas blocks up seal sleeve 130 is connected to the inner cavity of motor shroud sleeve 140, therefore blocks up chamber both for gas.
In the embodiment of such as Fig. 1 to Fig. 3 and Fig. 5, lower end and the partition board portion 151 of motor shroud sleeve 140 are welded, only gas
The upper end of stifled seal sleeve 130 forms flange, and only gas blocks up the flange of seal sleeve 130 and is bolted with partition board portion 151, biography
There is bearing and bearing holder (housing, cover), partition board portion 151 to be set on bearing holder (housing, cover) at the middle part of moving axis 10.
Preferably, in the embodiment of such as Fig. 1 and Fig. 2, the lower section of partition board portion 151 is additionally provided with retaining ring 152, retaining ring
152 are set on transmission shaft 10, and the effect of retaining ring 152 is that the medium in delivery pump 20 is prevented directly to be splashed to partition board portion 151.
Preferably, as shown in Fig. 2, sealing further includes first sealing device 161, first sealing device 161 setting every
The junction of plate portion 151 and transmission shaft 10.The effect of first sealing device 161 is to prevent the medium in delivery pump 20 from directly splashing
To partition board portion 151.
Preferably, as shown in figure 3, canned motor pump further includes pressurizing pack, pressurizing pack is placed in gas and blocks up in seal sleeve 130,
When pumped medium, which enters gas, blocks up in seal sleeve 130, pressurizing pack is blocked up in seal sleeve 130 by improving gas above medium
Pressure makes medium level maintain certain range.
Specifically, pressurizing pack includes the first liquid level detection device 141 and the second liquid level detection device 142；Pumped medium
After being blocked up in seal sleeve 130 into gas, when the first liquid level detection device senses medium, on compressed air tunnel 144
Solenoid valve open, blocked up in seal sleeve 130 to gas and convey compressed air, the pressure of compressed air is more than medium pressure at axle envelope
Power, medium liquid level decline；When medium liquid level drops to the second liquid level detection device 142, the second liquid level detection device 142 incudes not
When to medium, the solenoid valve on compressed air tunnel 144 is closed, and the input of compressed air is stopped.
Preferably, in this embodiment, pressurizing pack further includes third liquid level detection device 143；When medium liquid level is less than
Third liquid level detection device 143, when the induction of third liquid level detection device 143 is less than medium, the solenoid valve on relief pipeline 145 is opened
It opens, compressed air is discharged by relief pipeline 145, and medium liquid level is begun to ramp up；When the second liquid level detection device 142 senses
When the medium risen, the solenoid valve on relief pipeline 145 is closed, and the discharge of compressed air is stopped.
Pump work or it is standby when, the medium liquid level overflowed at axle envelope is fluctuated in the second about 142 liquid level detection device, as long as
No more than the first liquid level detection device 141 or it is not less than third liquid level detection device 143, on compressed air tunnel 144
Solenoid valve on solenoid valve and relief pipeline 145 is at closed state.
Preferably, as shown in figure 4, in this embodiment, sealing further includes sealing partition board 160, sealing partition board 160 is arranged
It is blocked up in seal sleeve 130 in gas, the inner cavity that gas is blocked up seal sleeve 130 by sealing partition board 160 is divided into close to driving mechanism 30
Second chamber 102 of the first chamber 101 and close delivery pump 20, the second chamber 102 are that gas blocks up chamber, the first chamber 101 and motor shroud sleeve
140 inner cavity connection.
The inner cavity that gas is blocked up seal sleeve 130 by sealing partition board 160 is divided into the first chamber 101 and the second chamber 102, wherein first
Chamber 101 is connected to the inner cavity of motor shroud sleeve 140.
This structure is more specifically divided into three kinds of embodiments：First chamber 101 is connected to the second chamber 102, motor shroud sleeve
140 inner cavity, the first chamber 101 and the second chamber 102 are that gas blocks up chamber；First chamber 101 and the sealing of the second chamber 102, motor housing
Inner cavity, the first chamber 101 and the second chamber 102 of cylinder 140 are that gas blocks up chamber；First chamber 101 and the sealing of the second chamber 102, motor shielding
The inner cavity of sleeve 140, the first chamber 101 do not form gas and block up chamber, and only the second chamber 102 is that gas blocks up chamber.
In the embodiment show in figure 3, retaining ring 152 is not set, this is because sealing partition board 160 can play blocking
The effect of splashing.
Preferably, as shown in figure 4, No leakage efficient non-leakage canned motor pump further includes the first air inlet 131 and the first outlet
Mouth 132, the first air inlet 131 and the first gas outlet 132 are connect with the second chamber 102.It is highly preferred that No leakage efficient non-leakage
Canned motor pump further includes the second air inlet 133 and/or the second gas outlet 134, and the second air inlet 133 is connect with the first chamber 101, and second
Gas outlet 134 is connect with the first chamber 101.
Preferably, in this embodiment, sealing further includes third sealing device, and the third sealing device is arranged in institute
State the junction of sealing partition board 160 and the transmission shaft 10.
In the embodiment show in figure 4, retaining ring 152 is not set equally, this is because third sealing device can play
Stop the effect splashed.
Preferably, it is provided with cooling device outside motor shroud sleeve 140.
Specifically, 140 outer sheath of motor shroud sleeve is equipped with cooling cover 190, motor shroud sleeve 140 and cooling cover
Waterway is formed between 190, can lead to coolant liquid and motor shroud sleeve 140 is cooled down, and then driving mechanism 30 is carried out
It is cooling.
The coolant inlet 191 of cooling cover is arranged below at position, and cooling liquid outlet 192 is disposed over position
Place.
Preferably, in the embodiment of such as Fig. 2, Fig. 3, efficient non-leakage canned motor pump further includes return duct 170, return duct
170 one end is blocked up chamber with gas and is connect, and the other end of return duct 170 is connect with the arrival end of delivery pump 20.
Return duct 170 can make to bring about the desired sensation by the negative pressure of the arrival end of delivery pump 20 stifled bottom of chamber portion medium back flow to conveying
The arrival end of pump 20, to ensure the stable operation of efficient non-leakage canned motor pump.
Preferably, as shown in figure 5, efficient non-leakage canned motor pump is horizontal pump, the company of partition board portion 151 and the transmission shaft 10
The place of connecing is provided with first sealing device 161.The effect of first sealing device 161 is to prevent the medium in delivery pump 20 from directly splashing
To partition board portion 151.Gas blocks up at seal sleeve 130 and the link position of the delivery pump 20 and is provided with the second sealing device 180, uses
It is blocked up in seal sleeve 130 in preventing the medium in the delivery pump 20 from entering the gas.
In addition, in the present embodiment, the gas blocks up intracavitary and is provided with pressure sensor and/or liquid level sensor.
Preferably, in the present embodiment, the bottom of the stifled chamber of gas is provided with leakage fluid dram 135.
In the embodiment of such as Fig. 1 to Fig. 5, one end of the separate delivery pump 20 of driving mechanism 30 is provided with upper cover 40, uses
In being provided with upper cover air inlet 41 and upper cover exhaust outlet 42 on closing motor shroud sleeve 140, upper cover 40, with motor shroud sleeve
140 inner cavity connection.
In another embodiment, as shown in Figure 6 and Figure 7, efficient non-leakage canned motor pump further includes：It is arranged in transmission shaft 10
On lower bearing component 230 and upper bearing (metal) component 240；The sealing other end is connect by upper bearing (metal) component 240 with transmission shaft 10；
The first sealing 232 is provided on lower bearing component 230；The first sealing is formed between sealing, the first sealing 232 and delivery pump 20
Chamber 201, first annular seal space 201 are that gas blocks up chamber；The second cavity is formed between sealing, the first sealing 232 and upper bearing (metal) component 240
202, the second cavity 202 is interior filled with sealing fluid.
The work department of delivery pump 20 is isolated from the outside by the efficient non-leakage canned motor pump of these embodiments using two chambers
It opens, and the second cavity 202 forms the closed shield to first annular seal space 201, improves the shielding of first annular seal space 201
Can, it reduces the probability leaked in medium transmission process and also avoids extraneous air to avoid the material in work department from leaking
Or work department is immersed in pollution.
Specifically, by first annular seal space 201 and the second cavity between the pump chamber and driving mechanism of efficient non-leakage canned motor pump
202 isolation, realize anti-leak, anti-pollution, be provided wherein the sealing fluid in the second cavity 202 can also be first annular seal space 201
Shielding so that no matter material in pump chamber or extraneous air are required to through at least twice shielding measure, and shield effectiveness is good,
And pump group system does not need overall isolation, simpler compared to existing efficient non-leakage shield pump structure, safeguards simple, pump
The expense of group operation and maintenance is also opposite to be reduced.Further, since first annular seal space 201 and the second cavity 202 are only located at transmission shaft 10
A part outside, therefore efficient non-leakage canned motor pump is small for the kinetic equation loss of driving mechanism, compares existing efficient nothing
Leakage shielding pumps, the efficiency higher of pump group.
Preferably, upper bearing (metal) component 240 includes：Upper bearing (metal) 241 is socketed on the upper axle journal of transmission shaft 10；Upper press cover
242, it is arranged in the top of upper bearing (metal) 241, the upper end of upper press cover 242 is connect with transmission shaft 10；Bearing body 243, is set in axis
241 outside is held, the lower end of bearing body 243 is connect with transmission shaft 10, and the upper end of bearing body 243 connects with the lower end of upper press cover 242
It connects.
In embodiment as shown in Figure 6, upper press cover 242 is arranged in the upside of upper bearing (metal) component 240, which can
Not have leakproofness.The efficient non-leakage canned motor pump of this structure belongs to vertical structure, and transmission shaft 10 is longitudinally arranged.When the reality
When applying the efficient non-leakage canned motor pump of example applied to pump group sealing, which is suitable for the similar clear water of conveying, slurry and sewage etc.
It is not afraid of pollution, non-toxic or low-toxic a kind of medium.
Preferably, efficient non-leakage canned motor pump further includes：Second sealing 260, be arranged the top of upper bearing (metal) 241 and with it is upper
240 air-tightness of parts of bearings connects, and the second sealing 260 is connect with 10 air-tightness of transmission shaft.
In embodiment as shown in Figure 7, the upside of upper bearing (metal) 241 is provided with the second sealing 260, and the second sealing 260 is
Second cavity 202 provides dual-seal protection.It is close that second is formed between first sealing, 232, second sealing 260, sealing
Seal chamber 203.The efficient non-leakage canned motor pump of this structure belongs to vertical structure, and transmission shaft 10 is longitudinally arranged.When the embodiment
When efficient non-leakage canned motor pump is applied to pump group sealing, which is suitable for conveying poisonous and harmful material, or easily by outside contamination
Material, providing better seal performance prevents that material from leaking or extraneous impurity enters pump chamber never contaminated material.
Preferably, the sealing fluid in the second seal chamber 203 is identical as pumped (conveying) medium.
In the efficient non-leakage canned motor pump of the sealing system with the second sealing 260, if 232 damage of the first sealing, funeral
After depressurization, the sealing fluid in the second seal chamber 203 can flow into first annular seal space 201, maintain the sealing effect to pump group；
If the sealing between first annular seal space 201 and pump group is also damaged, sealing fluid can enter pump chamber, be mixed with pumped (conveying) medium, but
Sealing fluid in second sealing 260 may not flow into the second seal chamber 203, and the sealing effect of the second sealing 260 still has, because
This pump group is still by shield gasket.
Preferably, in the embodiment as shown in Fig. 6 and Fig. 7, efficient non-leakage canned motor pump further includes：Cooling fan 282,
It is arranged at transmission shaft 10 and the link position of driving mechanism, and is driven by driving mechanism；Cooling coil 281, one end is connected to
First sealing 232 bottom simultaneously be connected to the second cavity 202, the other end be connected on upper bearing (metal) component 240 and with the second cavity
202 connections, a part for cooling coil 281 surrounds to be arranged forms coil pipe portion in the outside of cooling fan 282.
In this embodiment, the outlet of cooling coil 281 is arranged on the bearing body 243 of upper bearing (metal) component 240, thus with
Second cavity 202 or the connection of the second seal chamber 203.And in the embodiment show in figure 6, the outlet of cooling coil 281 is arranged
On the upper press cover 242 of upper bearing (metal) component 240, after sealing fluid after cooling first passes through upper bearing (metal) 241 and bearing body 243, enter
In second cavity 202.
Preferably, first annular seal space 201 and/or the second seal chamber 203 are interior filled with nitrogen, inert gas or air.
Preferably, delivery pump 20 includes throat bushing 22, and throat bushing 22 is placed in the company of transmission shaft 10 and the shaft of delivery pump 20
Meet place.
Preferably, delivery pump 20 includes back blades 21.
Preferably, driving mechanism 30 includes motor 31 and electric machine support 32, and the output shaft of motor 31 passes through shaft coupling and biography
Moving axis 10 connects.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
It should be noted that term " first " in description and claims of this specification and above-mentioned attached drawing, "
Two " etc. be for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that using in this way
Data can be interchanged in the appropriate case, so that embodiments of the present invention described herein for example can be in addition to herein
Sequence other than those of diagram or description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that
Be to cover it is non-exclusive include, for example, containing the process of series of steps or unit, method, system, product or equipment not
Those of be necessarily limited to clearly to list step or unit, but may include not listing clearly or for these processes, side
The intrinsic other steps of method, product or equipment or unit.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (17)
1. a kind of efficient non-leakage canned motor pump, which is characterized in that including：
Transmission shaft (10)；
Delivery pump (20), is arranged the first end in the transmission shaft (10), and the delivery pump (20) includes being connected to the transmission
The work department of the first end of axis (10)；
Driving mechanism (30) is arranged the second end in the transmission shaft (10) and is drivingly connected with the transmission shaft (10)；
Sealing is set in the outside of the transmission shaft (10), one end of the sealing and the delivery pump (20) air-tightness
Connection, and the sealing forms seal chamber in the outside of the transmission shaft (10), in the seal chamber there is gas to block up chamber.
2. efficient non-leakage canned motor pump according to claim 1, which is characterized in that the sealing includes：
Gas blocks up seal sleeve (130), and one end that the gas blocks up seal sleeve (130) is connect with the delivery pump (20) air-tightness,
The gas blocks up in seal sleeve (130), and there is gas to block up chamber；
Motor shroud sleeve (140), one end and the gas of the motor shroud sleeve (140) block up the another of seal sleeve (130)
One end connects, and driving mechanism (30) setting is in the motor shroud sleeve (140).
3. efficient non-leakage canned motor pump according to claim 2, which is characterized in that the sealing further includes partition board portion
(151), the connection of seal sleeve (130) and the motor shroud sleeve (140) is blocked up in partition board portion (151) setting in the gas
At position, the inner cavity that the gas blocks up seal sleeve (130) is connected to the inner cavity of the motor shroud sleeve (140).
4. efficient non-leakage canned motor pump according to claim 3, which is characterized in that the efficient non-leakage canned motor pump also wraps
Pressurizing pack is included, the pressurizing pack is placed in the gas and blocks up in seal sleeve (130), when pumped medium enters the stifled sealing of the gas
When sleeve (130) is interior, the pressurizing pack makes medium level by improving the pressure that gas blocks up above seal sleeve (130) interior medium
Maintain certain range.
5. efficient non-leakage canned motor pump according to claim 4, which is characterized in that the pressurizing pack includes the first liquid level
Detection device (141) and the second liquid level detection device (142)；
After pumped medium enters in the stifled seal sleeve (130) of the gas, when the first liquid level detection device senses medium, compression
Solenoid valve on airflow pipe (144) is opened, and is blocked up to the gas and is conveyed compressed air, the pressure in seal sleeve (130)
The pressure of contracting air is more than pressure medium at axle envelope, and medium liquid level declines；
When medium liquid level drops to the second liquid level detection device (142), the second liquid level detection device (142) incudes less than medium
When, the solenoid valve on compressed air tunnel (144) is closed, and the input of compressed air is stopped.
6. efficient non-leakage canned motor pump according to claim 5, which is characterized in that the pressurizing pack further includes third liquid
Level detecting apparatus (143)；
When medium liquid level is less than third liquid level detection device (143), and third liquid level detection device (143) is incuded less than medium,
Solenoid valve on relief pipeline (145) is opened, and compressed air is discharged by relief pipeline (145), and medium liquid level is begun to ramp up；
When the second liquid level detection device (142) senses the medium of rising, the solenoid valve on relief pipeline (145) is closed, and is stopped
The only discharge of compressed air.
7. efficient non-leakage canned motor pump according to claim 3, which is characterized in that the sealing further includes the first sealing
Device (161), the first sealing device (161) are arranged in the junction of the partition board portion (151) and the transmission shaft (10).
8. efficient non-leakage canned motor pump according to claim 3, which is characterized in that the sealing further includes sealing partition board
(160), sealing partition board (160) setting is blocked up in the gas in seal sleeve (130), and the sealing partition board (160) will be described
The inner cavity that gas blocks up seal sleeve (130) is divided into close to the first chamber (101) of the driving mechanism (30) and close to the conveying
Second chamber (102) of (20) is pumped, second chamber (102) is that gas blocks up chamber, first chamber (101) and the motor shroud sleeve
(140) inner cavity connection.
9. efficient non-leakage canned motor pump according to claim 8, which is characterized in that the efficient non-leakage canned motor pump also wraps
The first air inlet (131) and the first gas outlet (132) are included, first air inlet (131) and first gas outlet (132) are equal
It is connect with second chamber (102).
10. efficient non-leakage canned motor pump according to claim 8, which is characterized in that the efficient non-leakage canned motor pump is also
Including the second air inlet (133) and/or the second gas outlet (134), second air inlet (133) and first chamber (101)
Connection, second gas outlet (134) connect with first chamber (101).
11. efficient non-leakage canned motor pump according to claim 7 or 8, which is characterized in that the efficient non-leakage canned motor pump
Further include return duct (170), one end of the return duct (170) and the gas block up chamber and connect, the return duct (170) it is another
End is connect with the arrival end of the delivery pump (20).
12. efficient non-leakage canned motor pump according to claim 7, which is characterized in that the efficient non-leakage canned motor pump is
Horizontal pump, the efficient non-leakage canned motor pump further include the second sealing device (180)；
The connection position of seal sleeve (130) and the delivery pump (20) is blocked up in second sealing device (180) setting in the gas
Place is set, is blocked up in seal sleeve (130) for preventing the medium in the delivery pump (20) from entering the gas；
The gas blocks up intracavitary and is provided with pressure sensor and/or liquid level sensor.
13. efficient non-leakage canned motor pump according to claim 12, which is characterized in that the bottom that the gas blocks up chamber is provided with
Leakage fluid dram (135).
14. efficient non-leakage canned motor pump according to claim 1, which is characterized in that the efficient non-leakage canned motor pump is also
Including：
The lower bearing component (230) and upper bearing (metal) component (240) being arranged on the transmission shaft (10)；
The sealing other end is connect by the upper bearing (metal) component (240) with the transmission shaft (10)；
It is provided with the first sealing (232) on the lower bearing component (230)；
First annular seal space (201) is formed between the sealing, first sealing (232) and the delivery pump (20), it is described
First annular seal space (201) is that gas blocks up chamber；
The second cavity (202), institute are formed between the sealing, first sealing (232) and the upper bearing (metal) component (240)
It states in the second cavity (202) filled with sealing fluid.
15. efficient non-leakage canned motor pump according to claim 14, which is characterized in that the efficient non-leakage canned motor pump is also
Including：Second sealing (260), setting is in the top of the upper bearing (metal) component (240), first sealing (232), the second sealing
(260), the second seal chamber (203) is formed between sealing.
16. the efficient non-leakage canned motor pump according to claims 14 or 15, which is characterized in that the efficient non-leakage shielding
Pump further includes：
Cooling fan (282) is arranged at the transmission shaft (10) and the link position of the driving mechanism (30), and by described
Driving mechanism (30) drives；
Cooling coil (281), one end are connected to the bottom of first sealing (232) and are connected to second cavity (202),
The other end is connected on the outer rim partition board of the upper bearing (metal) component (240) and is connected to second cavity (202), the cooling
A part for coil pipe (281) forms coil pipe portion around setting in the outside of the cooling fan (282).
17. efficient non-leakage canned motor pump canned motor pump according to claim 15, which is characterized in that the first annular seal space
(201) and/or second seal chamber (203) is interior filled with nitrogen, inert gas or air.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017104111524 | 2017-06-02 | ||
| CN201710411152 | 2017-06-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108457894A true CN108457894A (en) | 2018-08-28 |
Family
ID=63215654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810549073.4A Pending CN108457894A (en) | 2017-06-02 | 2018-05-31 | Efficient non-leakage canned motor pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108457894A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109253065A (en) * | 2018-09-10 | 2019-01-22 | 奇力士（武汉）智慧水务科技有限公司 | Silent pump |
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| US3513942A (en) * | 1967-11-27 | 1970-05-26 | Teikoku Denki Seisakusho Kk | Device for lubricating a bearing for use in a canned motor pump and an agitator |
| JPS62182496A (en) * | 1986-02-07 | 1987-08-10 | Teikoku Denki Seisakusho:Kk | Gas seal type canned motor pump |
| JPH05288174A (en) * | 1992-04-13 | 1993-11-02 | Mitsubishi Electric Corp | Scroll fluid machine |
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| CN109253065A (en) * | 2018-09-10 | 2019-01-22 | 奇力士（武汉）智慧水务科技有限公司 | Silent pump |
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