CN106870384A - A kind of Centrifugal liquid pump - Google Patents
A kind of Centrifugal liquid pump Download PDFInfo
- Publication number
- CN106870384A CN106870384A CN201710175317.2A CN201710175317A CN106870384A CN 106870384 A CN106870384 A CN 106870384A CN 201710175317 A CN201710175317 A CN 201710175317A CN 106870384 A CN106870384 A CN 106870384A
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- China
- Prior art keywords
- seal
- sealing
- pump
- rubber matrix
- filter
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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
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
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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
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
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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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
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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
- F04D29/58—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
-
- 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
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
Abstract
A kind of Centrifugal liquid pump,Including pump cover,The pump case being connected with pump cover,The bearing block being connected with pump case,Impeller in pump case,Live spindle is connected with impeller,Live spindle stretches out pump case connection bearing block,Live spindle is provided with sealing with the contact position of pump case,Sealing includes the seal box being connected with pump case,Seal box gland,By the primary seal of pump case side,Secondary sealing on rear side of primary seal,Secondary sealing is external mechanical seal,Primary seal is formed by stacking by several lip-type packings,Lip-type packing is the sealing ring with filter,Sealing ring with filter includes ring-shaped rubber matrix,It is embedded in the web frame in rubber matrix,Rubber matrix inner ring is provided with seal lip,Rubber matrix side is inflow side,Opposite side is outflow side,Filter house is provided between rubber matrix and seal lip,Filter house includes being filled with the accommodating chamber of filter body and makes the run-through channel of accommodating chamber and the insertion of rubber matrix outflow side,Slurry enters accommodating chamber and is filtered through filter body from inflow side,Net liquid after filtering exits into outflow side from run-through channel.
Description
Technical field
Field is made the present invention relates to centrifugal pump.
Background technology
Centrifugal liquid pump is the conventional conveying equipment for being used to convey various slurries in industrial circle, being widely used in
The industrial circles such as work, smelting, mineral products processing, environment-friendly engineering, the Centrifugal liquid pump of existing domestic operation on duty has tens thousand of.
What Centrifugal liquid pump was commonly used is sealed with double mechanical seal, rubber lip dynamic seal, packing seal etc., this
A little sealings all there are problems that two it is insoluble for a long time, i.e.,：One is that the solids such as sand grains can enter seal combination, is ground away
Sealing；Two is either which kind of shaft seal, all can damage sealing because of rotation, frictional heating.It is conventional to solve the above problems
Method be, in the external cooling water of sealing, to be rinsed sand material and coolant seal.By the flushing of cooling water, can properly increase
The service life of sealing, but substantial amounts of cooling water must be consumed, every pump consumes more than 4 tons of water resource daily, while can also produce
The secondary pollution of cooling water, increases the pressure of wastewater treatment, and then increase environmentally friendly cost.
Moreover, in original technology, slurry pump seal is all unable to aneroid idle running, is operated on the premise of not external cooling water,
Sealing is damaged at once.
Therefore, above-mentioned deficiency is insoluble problem for a long time in the industry, and effective solution party is there is no so far
Case, in the market also has no the product for effectively overcoming problems, therefore still has the space of innovation lifting.
The content of the invention
The present invention is in view of the shortcomings of the prior art, there is provided a kind of security that can lift slurry centrifugal pump seal, reliability
Property, making sealing on the premise of not external cooling water, energy dry run is sealed without damaging, not only water saving but also the centrifugation of safety
Formula shurry pump.
To realize the object of the invention, there is provided following technical scheme：A kind of Centrifugal liquid pump, the shurry pump is preceding suction
Formula, including front opening pump cover and pump cover connection pump case and pump case connection bearing block, the impeller in pump case and
Impeller connection live spindle, live spindle stretch out pump case connection bearing block, and it is close that live spindle is provided with axle with the contact position of pump case
Envelope, sealing includes and the seal box, seal box gland, the primary seal by pump case side that pump case is connected, secondary close on rear side of primary seal
Envelope, secondary sealing is external mechanical seal, it is characterised in that primary seal is formed by stacking by several lip-type packings, lip packing
Circle is the sealing ring with filter, and primary seal, seal box and secondary sealing three constituted net sap cavity, with the close of filter
Seal includes ring-shaped rubber matrix, the web frame being embedded in rubber matrix, and rubber matrix inner ring is provided with seal lip, rubber
Matrix body side is inflow side, and opposite side is outflow side, and filter house is provided between rubber matrix and seal lip, and filter house includes
Accommodating chamber filled with filter body and make the run-through channel of accommodating chamber and the insertion of rubber matrix outflow side, slurry enters from inflow side
Accommodating chamber is filtered through filter body, and the net liquid after filtering exits into outflow side from run-through channel.
Preferably, accommodating chamber is the annular groove being opened on rubber matrix, run-through channel is to be opened in annular groove bottom
Several through holes in portion.
Preferably, accommodating chamber is to set up several projections between rubber matrix and seal lip, offered on projection
Groove, filter body is filled in groove, and run-through channel is the through hole for being opened in bottom portion of groove.
Preferably, filter body includes porous ceramics, porous plastics, the filter cloth of overlapping or the thin filler of material.
Preferably, being provided with back blade on impeller.
Preferably, being the wing that rotating ring outside is provided with raw wind radiating.
Preferably, seal box offers cooling water turnover pipe joint.
Preferably, being provided with radiating fin on seal box.
To realize the object of the invention, there is provided another technical scheme：A kind of Centrifugal liquid pump, the shurry pump is side
Suction, including forward end seal pump cover and pump cover connection pump case and pump case connection bearing block, the impeller in pump case,
Live spindle, live spindle are connected with impeller and stretch out pump case connection bearing block, live spindle is provided with axle with the contact position of pump case
Sealing, sealing includes and seal box, seal box gland, the primary seal by pump case side, the secondary sealing on rear side of primary seal, secondary sealing
It is mechanical seal, pump case connection suction inlet threeway, axle sleeve is sheathed in live spindle, it is characterised in that primary seal is by several lips
Shape sealing ring is formed by stacking, and lip-type packing is the sealing ring with filter, primary seal, seal box and secondary sealing three's structure
Into excessively net sap cavity, the sealing ring with filter includes ring-shaped rubber matrix, the web frame being embedded in rubber matrix, rubber
Matrix inner ring is provided with seal lip, and rubber matrix side is inflow side, and opposite side is outflow side, rubber matrix and seal lip
Between be provided with filter house, filter house includes accommodating chamber filled with filter body and makes accommodating chamber and the insertion of rubber matrix outflow side
Run-through channel, slurry enters accommodating chamber and filtered through filter body from inflow side, and the net liquid after filtering exits into outflow from run-through channel
Side.
Preferably, accommodating chamber is the annular groove being opened on rubber matrix, run-through channel is to be opened in annular groove bottom
Several through holes in portion.
Preferably, accommodating chamber is to set up several projections between rubber matrix and seal lip, offered on projection
Groove, filter body is filled in groove, and run-through channel is the through hole for being opened in bottom portion of groove.
Beneficial effect of the present invention：Seem in the present invention with original mechanical seal structure it makes no odds, only in original
Add one or more with holes between mechanical seal and pump inner chamber body and filter core rubber lip-type packing, and in the rotating ring of sealing
Periphery adds the wing of radiating, and but serving makes combination sealing to convey slurry also not abradable seal, again can without it is external simultaneously
Input cooling water, saving water resource；Can also dry run, the effect of lift-off seal security.The allomeric function of sealing considerably beyond
Machine envelope, rubber lip-type packing are individually superimposed using function, and its core reasons is that back blade, rubber lip-type packing
On through hole, the filter body in rubber lip-type packing, net sap cavity, the radiating fin on seal box, respective independent function phase
Mutual conversion, interdependence, interaction, generate effect of the one-plus-one more than two.
The working mechanism of the function and sealing to each seal assembly, effect now to each component, function are understood for convenience
And working mechanism each other is further described.
1st, the function of mechanical seal and effect are to seal the clear liquid filtered out from pump chamber by filter sand hole.
2nd, the raw wind radiating of sealing air cooling system major function and effect that the wing on rotating ring is constituted, takes away rotating ring, stationary ring
On the temperature that is produced by spin friction, also distribute the temperature produced by the friction between sealing ring and axle sleeve.
Sealing ring function is to separate the space between pump chamber and net sap cavity, mixes slurry not convection current between the two.
Net sap cavity is a relatively closed cavity, its function and is act as：One is taken in by passing through filter sand hole in pump chamber
Clear liquid flowed into after filtering or outside injection, clear liquid is as the progradation produced by working media：One be lubrication rotating ring,
The fricting working surface of stationary ring, two is the effect for producing heat transfer, and the heat energy that axle sleeve and lip-type packing spin friction are produced is passed
Lead on stationary ring, and then by air cooling system, heat energy is distributed；Three is that work clear liquid can also transmit pressure, is made in annular seal space
Pressure it is substantially equivalent with the pressure of slurry in pump chamber, be bordering on balance, be sealing ring run under without pressure situation work create bar
Part, so lift-off seal circle service life.
3rd, the structure and function of filter house, basic structure is the through hole that the filter body combination for having filter sand function is installed, mainly
Function is that the solid particulate matter in pump chamber can be prevented to enter annular seal space, and the net liquid energy in slurry is entered cavity, and fills net
Sap cavity, undertakes the effect of supplement working solution.
4th, the 26S Proteasome Structure and Function of main impeller back blade or accessory impeller.The back blade of main impeller is to be produced on the main lobe impeller blade back of the body
Spoke afterwards, its major function is, when pump operation works, to produce centrifugal force, is the sealing position inner chamber decompression of pump, makes centrifugation
The sealing ring of shurry pump, annular seal space, mechanical seal, in the state of a relatively low pressure, sealing position in the present invention
Pressure, design setting between 0.01 ~ 0.1MPa, the design of this pressure, can be greatly lowered machine envelope in rotating ring, stationary ring it
Between PVS values（Pressure rotating ratio）, so that the frictional resistance between reducing dynamic and static ring, and then heating during reduction sound inscription of loop
Value, and then make refrigerating function that air cooling system seals to machine more effectively.
The function of above-mentioned each component of sealing and the working mechanism relation for interacting：The major function part of this novel seal
There is back blade（Or accessory impeller）, sealing ring, filter house, mechanical seal, net sap cavity, air cooling system constitute, and produce work(
Can synthesis result be in other words that sky machine can be driven while conveying slurry, and without additional cooling water, and do not leak, use
Life-span speciality.This good effect be above-mentioned each component each without function, only after they combine, as one
After individual entirety, this marvellous effect could be produced, be also other single mechanical seals, dynamic seal, seal with elastometic washer institute
The function of not possessing, here it is where core value of the invention.In seal assembly of the invention, the presence and selection of each component
Peculiar part is had no, back blade is also used in the conventional sealing of slurry centrifugal pump（Or accessory impeller）, sealing ring, mechanical seal,
The components such as air cooling system, but be used alone or during selective application in these components, will not produce the anti-of sealing of the invention
Idle running, sealing slurry, not additional cooling water, the effect of long service life.Only they are combined by certain frame mode
Come, allow the function of each component to form system, an entirety, and interaction is acted under motion state, could constitute should
Unique sexual function of sealing.And each component in the present invention is indispensable, will otherwise change the characteristic of combination sealing, influence
The effect and service life of sealing.For example：Without back blade（Or accessory impeller）The pressure of the fluid in annular seal space will be increased
Power, the ratio pressure that machine envelope must be between lifting dynamic and static ring for counter pressure, just, and then the friction of dynamic and static ring will be increased, sealing
Therefore temperature can just rise, and then cause the air cooling system can not coolant seal component completely.And for example, sealing ring and filter sand are removed
Hole, will make the slurry with particle enter net sap cavity, and destructive corrasion is produced to machine envelope, damage machine envelope.Also such as, if
Net sap cavity is not set, because the accumulated temperature that rotating shaft rotation is produced would not be transferred to be distributed on rotating ring by working solution on sealing ring,
The service life of sealing ring will shorten because temperature is too high.For another example, if not setting machine envelope, the work in net sap cavity can be caused again
Fluid pressure generation pressure difference in hydraulic coupling and pump chamber, the pressure of pressure difference will be transferred on the lip of sealing ring, sealing ring
Service life can be greatly lowered.Again for another example, if not setting air cooling system, then the bulk temperature of sealing will rise, close
The life-span of envelope will shorten.
Therefore said modules and its respective function are indispensable, functionally, interdependent each other, interact, structure
Into a special sealing system.
Brief description of the drawings
Fig. 1 is the structure diagram of embodiment 1.
Fig. 2 is the partial enlarged drawing in A portions in Fig. 1.
Fig. 3 is the structure diagram of the sealing ring with filter in Fig. 1.
Fig. 4 is the left view of Fig. 3.
Fig. 5 is second structural representation of Fig. 3.
Fig. 6 is the third structural representation of Fig. 3.
Fig. 7 is the 4th kind of structural representation of Fig. 3.
Fig. 8 is that Fig. 3 is the structure diagram of Double-lip-opening seal ring.
Fig. 9 is that Fig. 3 is the ring structure sketch that capping is provided with the outside of filter body.
Figure 10 is the structure diagram of embodiment 2.
Figure 11 is the partial enlarged drawing in A portions in Figure 10.
Figure 12 is sealed structure chart of the sealing position of embodiment 3 with filling opening.
Figure 13 is sealed structure chart of the sealing position of embodiment 3 with filling opening and slag-drip opening.
Figure 14 is the pump configuration sketch of the multigroup installation of the sealing ring with filtering function in embodiment 4.
Specific embodiment
Embodiment 1：Referring to Fig. 1 ~ 9, a kind of Centrifugal liquid pump, the shurry pump be preceding suction, including front opening pump cover
1 and pump cover 1 connection pump case 2 and pump case 2 connection bearing block 3, the impeller 4 in pump case 2 and impeller 4 connection rotation
Main shaft 5, live spindle 5 stretch out the connection bearing block 3 of pump case 2, and live spindle 5 is provided with sealing with the contact position of pump case 2, and axle is close
Package includes seal box 6.1, seal box gland 6.2, the primary seal 7 by the side of pump case 2, the pair of the rear side of primary seal 7 being connected with pump case 2
Sealing 8, secondary sealing 8 is external mechanical seal, and external mechanical seal includes stationary ring 8.1, rotating ring 8.2 and metal spring
8.3, stationary ring 8.1 is compressed by seal box gland 6.2, and primary seal 7 is formed by stacking by two lip-type packings 7.1, lip-type packing
7.1 is the sealing ring with filter, and primary seal 7, seal box 6.1 and the three of secondary sealing 8 constitute net sap cavity 9, and band filtering is filled
The sealing ring put includes ring-shaped rubber matrix 7.1.1, the web frame 7.1.2 being embedded in rubber matrix 7.1.1, rubber matrix
7.1.1 inner ring is provided with seal lip 7.1.3, and rubber matrix 7.1.1 sides are inflow side, and opposite side is outflow side, rubber-based
Filter house is provided between body 7.1.1 and seal lip 7.1.3, filter house includes being filled with the accommodating chamber of filter body 10 and makes appearance
Chamber is received with the run-through channel of rubber matrix 7.1.1 outflow side insertions, slurry is filtered into accommodating chamber from inflow side through filter body 10, mistake
Net liquid after filter exits into outflow side from run-through channel, and accommodating chamber is the annular groove being opened on rubber matrix 7.1.1
7.1.5, run-through channel is several through holes 7.1.6 for being opened in annular groove 7.1.5 bottoms.The material of filter body 10 be with
Filter filter cloth of porous ceramics, porous plastics or overlapping of function etc., it is also possible to be made up of the filler of thin material, in the present invention
It is not construed as limiting, has and prevent sand grains into sealing position function all within covering scope of the invention.The back of the body is provided with impeller 4
Blade 4.1.The outside of rotating ring 8.2 is provided with the wing 11 of raw wind radiating.
Used as second form of the accommodating chamber of embodiment 1, accommodating chamber is to set up in rubber matrix 7.1.1 and seal lip
7.1.3 several projections 12 between, open up fluted 12.1 on projection 12, filter body 10 is filled in groove 12.1, run-through channel
To be opened in the through hole 12.2 of the bottom of groove 12.1, groove 12.1 and through hole 12.2 can with circular, square, triangle or other
The hole of arbitrary shape.
Embodiment 2：Referring to Figure 10,11, a kind of Centrifugal liquid pump, the shurry pump is side-suction type, including forward end seal
Pump cover 1 and the pump case 2 and the bearing block 3 of the connection of pump case 2 of the connection of pump cover 1, the impeller 4 in pump case 2 and impeller 4 connect
Connect live spindle 5, live spindle 5 and stretch out the connection bearing block 3 of pump case 2, it is close that live spindle 5 is provided with axle with the contact position of pump case 2
Envelope, sealing includes and seal box 6.1, seal box gland 6.2, the primary seal 7 by the side of pump case 2, the secondary sealing of the rear side of primary seal 7
8, secondary sealing 8 is mechanical seal, the connection of pump case 2 suction inlet threeway 13, and axle sleeve 14 is sheathed in live spindle 5, if primary seal 7 by
2 lip-type packings 7.1 are formed by stacking, and lip-type packing 7.1 is the sealing ring with filter, primary seal 7, seal box 6.1
And the three of secondary sealing 8 constituted net sap cavity 9, the sealing ring with filter includes ring-shaped rubber matrix 7.1.1, is embedded in rubber
Web frame 7.1.2 in matrix body 7.1.1, rubber matrix 7.1.1 inner rings are provided with seal lip 7.1.3, rubber matrix
7.1.1 side is inflow side, and opposite side is outflow side, and filter house is provided between rubber matrix 7.1.1 and seal lip 7.1.3,
Filter house includes being filled with the accommodating chamber of filter body 10 and makes the insertion of accommodating chamber and rubber matrix 7.1.1 outflow side insertions
Road, slurry is filtered into accommodating chamber from inflow side through filter body 10, and the net liquid after filtering exits into outflow side from run-through channel.Hold
It is the annular groove 7.1.5 being opened on rubber matrix 7.1.1 to receive chamber, and run-through channel is to be opened in annular groove 7.1.5 bottoms
Several through holes 7.1.6.The material of filter body 10 is the filter cloth of the porous ceramics with filtering function, porous plastics or overlapping
Deng, it is also possible to it is made up of the filler of thin material, is not construed as limiting in the present invention, has prevention sand grains to enter sealing position function all
Within covering scope of the invention.
When pump machine runs, the lip-type packing 7.1 of primary seal 7 keeps off the slurry of conveying in pump chamber, the slurry in pump chamber
Liquid flows into net sap cavity 9 by the clear liquid after the filtering of filter body by run-through channel, and the solids in slurry chamber is by filtering function
Filter body 10 is kept off in pump chamber, after the net liquid in net sap cavity 9 is filled with, plays a part of the dynamic and static ring of lubricating mechanical sealing, together
When play a part of transferring heat energy again, the heat of generation that effectively lip-type packing 7.1 and axle sleeve 14 can be rubbed is transmitted to machine
On the rotating ring 8.2 of tool sealing, in the presence of the wing 11 of raw wind radiating, heat energy is dissipated.Net liquid conduct in net sap cavity 9
It is transmission Fluid pressure that working solution also has a kind of important function, the Fluid pressure of the both sides of lip-type packing 7.1 is kept balance,
Lip-type packing 7.1 is in without being rotated under pressure differential condition, thus extend the service life of lip-type packing 7.1.Lip is close
The reason for both sides fluid pressure energy of seal 7.1 is balanced be：Lip-type packing 7.1 is provided with run-through channel, and the presence of run-through channel makes pump
Insertion between chamber and net sap cavity 9, therefore pressure also just balances, the life-span of lip-type packing also just extends.The back of the body on impeller
Blade operationally, can depressurize to the fluid of sealing position, the Fluid pressure in the region is controlled in below 0.01MPa,
This can just cause that the load very little of Fluid pressure is born in the mechanical seal for sealing fluid portion, so that it may so that mechanical sealing linkage ring, quiet
PVS values between ring（Pressure rotating ratio between dynamic and static ring）Reduce.This can just make the frictional heating amount between dynamic and static ring reduce,
Friction is reduced, service life increases.
The pump of the combination sealing of said structure, it is possible to for slurry body, without external cooling water, by itself from
Cooling system, coolant seal component, reached can sealing slurry again without external cooling water, and also long service life, close
The characteristics of sealing property is reliable, has reached the purpose of the present invention.
Mechanical seal described in above-described embodiment 1 or 2, refers to the single-end surface machine sealing with dynamic and static ring, and its function is mainly can be close
The net liquid without solid material is sealed, the materials of dynamic and static ring can select the materials such as thermal conductivity factor good graphite, carborundum, copper, lead
The good purpose of hot coefficient is that the temperature inside sealing can be allowed to be distributed by radiating fin.
Closely sealed jacking force between mechanical seal dynamic and static ring described in above-described embodiment 1 or 2 can use metal spring, it is also possible to
With magnetic force as the closing force for sealing dynamic and static ring.
The lip-type packing 7.1 of above-described embodiment 1 or 2 refers to the sealing ring for having sealing cut-off fluid, the form of sealing ring
It can be single lip（Such as Fig. 3）, or the shape of double-lip（Such as Fig. 8）, the material of sealing ring can be rubber, it is also possible to
It is plastic material that tetrafluoro etc. has anti-wear performance.
In the present invention, the net sap cavity for setting relative closure plays the effect of key：One is that net liquid is taken in storage in, it is ensured that
The safety in operation of rear robot sealing, not by the erosive wear of mortar；Two is the pressure for transmitting liquid, makes lip-type packing two
The pressure balance of side, in the case of allowing the lip of lip-type packing to be not subject to Fluid pressure, safe operation, it is ensured that sealing makes
Use the life-span.The premise that net sap cavity can balance pressure is, in the case where cavity volume is closed, with pump chamber insertion, to make the fluid pressure of annular seal space
Fluid pressure in power and pump chamber is impartial；Three is that net liquid in annular seal space plays conductive force, can be the product in lip-type packing
Temperature conduction is distributed, and reduces the temperature at integral sealing position, and then improve the security of sealing.
Therefore, enclosed net sap cavity is set up, the prerequisite as above-mentioned functions, if without the net of relative closure
Sap cavity, three functions are retained there will be no above-mentioned weighing apparatus pressure, heat conduction, net liquid.Consequence without these three functions is：Rubber lip
The service life of sealing ring is short；Mechanical seal will be easily damaged because of washing away for solid particle, and the temperature of sealing position will be very
Height, sealing security reliability can decline, and the purpose of the present invention can not possibly be realized.Therefore, the setting of annular seal space is this technology side
The core of case.
Net liquid in as this annular seal space, can obtain in many ways, for example, band filtering can be opened up on sealing ring
Behind the hole of part, obtained from pump chamber；The pipeline that backflows can also be added in the liquid outlet of pump and connect acquisition with annular seal space, in order to prevent
Sand grains enters annular seal space, can add filter in pipeline opening of backflowing；Can also the direct seal box on the outside of annular seal space
Upper punching adds liquid-adding device acquisition.
The wing 11 of the radiating in the outside of the rotating ring 8.2 is axial concave-convex or annular radial shape, or fan blade shape, or porous
It is combined, as long as there is the heat sinking function just can be to be not construed as limiting in the present embodiment one or more of shape.
The optional ceramics of the material of the axle sleeve 14 or metal, specific requirement：One is to be matched with sealing ring wear-resisting, and two is have one
Fixed anti-corrosion function, preferably selects the ceramics such as optional carborundum, aluminum oxide.
Come off to prevent filter body from being washed away by slurry, preferable method is set in the side of the embedded filter body 10 of sealing ring
Capping 15（Such as Fig. 9）.
Impeller 4 described in embodiment, with back blade 4.1 or is provided with accessory impeller, is equipped with back blade 4.1 or accessory impeller
The centrifugal force that purpose is produced when being and being run using back blade, is the slurry decompression of sealing position, it is therefore intended that extension sealing makes
Use the life-span.
After each component combination of above-mentioned centrifugation shurry pump is installed, just obtained a kind of long service life, good seal performance, can
To convey slurry, it is also possible to the centrifugation shurry pump of short-term free-runing operation.
Embodiment 3：（Referring to Figure 12,13）The net sap cavity 9 in centrifugation shurry pump combination sealing as described in the embodiment 1,2
Net liquid, peripheral hardware servicing fluids mouthful 6.1.1 can obtain and supplement on seal box 6.1（Such as Figure 12）.The centrifugation of this sealing structure
Shurry pump can be applicable the post of conveying underflow, and a small amount of net liquid of outer filling from the lip of rubber lip-type packing and can be passed through
Pump chamber is flowed into passage and rinses sealing position, as long as a small amount of water of consumption can also have preferably sealing cooling developing result.
In order to rinse the slurry particulate matter entered because lip-type packing is failed in net sap cavity, preferable method is in sealing
Box downside sets slag-drip opening 6.1.2（Such as Figure 13）, it is convenient to rinse maintenance.
The liquid injection port and slag-drip opening for being set on seal box in the above-described embodiments, cool down for its form with common band
The rubber lip circle of water is sealed without significant difference, but its function is differed completely with effect.The former is a small amount of working solution of filling, often
Hour only 1 ~ 2Kg of consumption or so clear water, and the latter will consume the clear water of 200 ~ 300Kg per hour.
Embodiment 4：（Referring to Figure 14）Centrifugal liquid pump as described in Example 1, in order to lift the mistake of lip-type packing
Filter effect, makes the net liquid in net sap cavity be chronically at clean state, and effective method is that to set lip of the multiple tracks with filtering function close
Seal 7.1, the fluid allowed in pump chamber enters net sap cavity 9 after Multi-channel filtering, and then mechanical seal is not contacted particulate matter, then enters
And extend the service life of machine envelope.
In order to the heat accumulation for preventing the sealing ring with filtering function set up from being produced with axle sleeve spin friction is excessive, make temperature
Degree is raised, and hot damage is produced to lip-type packing, and preferable method is will to install the seal box heat conduction system of rubber lip-shaped ring
The metal for having counted makes, and is provided with seal box beneficial to radiating part, and radiating part is ring, piece, hole, makes the accumulated temperature inside sealing
Distribute, to ensure the safe application performance of combination sealing.
Claims (11)
1. a kind of Centrifugal liquid pump, the shurry pump is preceding suction, including pump cover and the pump cover connection of front opening pump
Shell and the bearing block of pump case connection, the impeller in pump case and impeller connection live spindle, live spindle stretch out pump case company
Spindle bearing, live spindle is provided with sealing with the contact position of pump case, and sealing includes the seal box, the sealing that are connected with pump case
Box gland, the primary seal by pump case side, the secondary sealing on rear side of primary seal, secondary sealing is external mechanical seal, it is characterised in that
Primary seal is formed by stacking by several lip-type packings, and lip-type packing is the sealing ring with filter, primary seal, seal box
And secondary sealing three constitutes net sap cavity, the sealing ring with filter includes ring-shaped rubber matrix, is embedded in rubber matrix
Web frame, rubber matrix inner ring is provided with seal lip, and rubber matrix side is inflow side, and opposite side is outflow side, rubber
Filter house is provided between matrix body and seal lip, filter house includes being filled with the accommodating chamber of filter body and makes accommodating chamber and rubber
The run-through channel of matrix body outflow side insertion, slurry enters accommodating chamber and is filtered through filter body from inflow side, and net liquid after filtering is from passing through
Passage exits into outflow side.
2. a kind of Centrifugal liquid pump according to claim 1, it is characterised in that accommodating chamber is to be opened on rubber matrix
Annular groove, run-through channel is several through holes for being opened in annular groove bottom.
3. a kind of Centrifugal liquid pump according to claim 1, it is characterised in that accommodating chamber for set up in rubber matrix with
Several projections between seal lip, open up fluted on projection, filter body is filled in groove, and run-through channel is to be opened in groove
The through hole of bottom.
4. a kind of Centrifugal liquid pump according to claim 1, it is characterised in that filter body includes porous ceramics, porous modeling
Material, the filter cloth of overlapping or the thin filler of material.
5. a kind of Centrifugal liquid pump according to claim 1, it is characterised in that back blade is provided with impeller.
6. a kind of Centrifugal liquid pump according to claim 1, it is characterised in that rotating ring outside is provided with the wing of raw wind radiating
The wing.
7. a kind of Centrifugal liquid pump according to claim 1, it is characterised in that seal box offers liquid injection port and deslagging
Mouthful.
8. a kind of Centrifugal liquid pump, the shurry pump is side-suction type, including pump cover and the pump cover connection of forward end seal pump
Shell and the bearing block of pump case connection, the impeller in pump case and impeller connection live spindle, live spindle stretch out pump case company
Spindle bearing, the contact position of live spindle and pump case is provided with sealing, sealing include with seal box, seal box gland, lean on
Secondary sealing on rear side of the primary seal of pump case side, primary seal, secondary sealing is mechanical seal, pump case connection suction inlet threeway, axle sleeve set
In live spindle, it is characterised in that primary seal is formed by stacking by several lip-type packings, lip-type packing is band filtering
The sealing ring of device, primary seal, seal box and secondary sealing three constituted net sap cavity, and the sealing ring with filter includes ring
Shape rubber matrix, the web frame being embedded in rubber matrix, rubber matrix inner ring are provided with seal lip, rubber matrix side
It is inflow side, opposite side is outflow side, filter house is provided between rubber matrix and seal lip, filter house includes being filled with filter core
The accommodating chamber of body and make the run-through channel of accommodating chamber and the insertion of rubber matrix outflow side, slurry enters accommodating chamber through filter from inflow side
Core body is filtered, and the net liquid after filtering exits into outflow side from run-through channel.
9. a kind of Centrifugal liquid pump according to claim 9, it is characterised in that accommodating chamber is to be opened on rubber matrix
Annular groove, run-through channel is several through holes for being opened in annular groove bottom.
10. a kind of Centrifugal liquid pump according to claim 9, it is characterised in that accommodating chamber for set up in rubber matrix with
Several projections between seal lip, open up fluted on projection, filter body is filled in groove, and run-through channel is to be opened in groove
The through hole of bottom.
11. a kind of Centrifugal liquid pumps according to claim 9, it is characterised in that radiating fin is provided with seal box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710175317.2A CN106870384A (en) | 2017-03-22 | 2017-03-22 | A kind of Centrifugal liquid pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710175317.2A CN106870384A (en) | 2017-03-22 | 2017-03-22 | A kind of Centrifugal liquid pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106870384A true CN106870384A (en) | 2017-06-20 |
Family
ID=59172122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710175317.2A Pending CN106870384A (en) | 2017-03-22 | 2017-03-22 | A kind of Centrifugal liquid pump |
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| Country | Link |
|---|---|
| CN (1) | CN106870384A (en) |
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|---|---|---|---|---|
| EP0328800A1 (en) * | 1986-07-28 | 1989-08-23 | Joseph Reginald Dunford | Filter assembly |
| JPH07109996A (en) * | 1993-10-13 | 1995-04-25 | Kubota Corp | Shaft seal device for vertical shaft pump |
| JPH07109995A (en) * | 1993-10-13 | 1995-04-25 | Kubota Corp | Shaft seal device for vertical shaft pump |
| CN2572146Y (en) * | 2002-09-27 | 2003-09-10 | 朱京臣 | Combined rotary axle seal |
| US20140325791A1 (en) * | 2013-05-01 | 2014-11-06 | Aes Engineering Ltd. | Annular seal cavity throat bushing |
| CN105605226A (en) * | 2016-03-28 | 2016-05-25 | 安徽力诺环保工程有限公司 | Sealing device capable of preventing silt |
| CN205277699U (en) * | 2015-12-31 | 2016-06-01 | 北京金风科创风电设备有限公司 | Wind generating set's bearing seal filtration and aerogenerator |
| CN106402014A (en) * | 2016-10-24 | 2017-02-15 | 宜兴市宙斯泵业有限公司 | Side-suction anti-abrasion centrifugal pump |
| CN206753916U (en) * | 2017-03-22 | 2017-12-15 | 宜兴市宙斯泵业有限公司 | A kind of Centrifugal liquid pump |
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2017
- 2017-03-22 CN CN201710175317.2A patent/CN106870384A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0328800A1 (en) * | 1986-07-28 | 1989-08-23 | Joseph Reginald Dunford | Filter assembly |
| JPH07109996A (en) * | 1993-10-13 | 1995-04-25 | Kubota Corp | Shaft seal device for vertical shaft pump |
| JPH07109995A (en) * | 1993-10-13 | 1995-04-25 | Kubota Corp | Shaft seal device for vertical shaft pump |
| CN2572146Y (en) * | 2002-09-27 | 2003-09-10 | 朱京臣 | Combined rotary axle seal |
| US20140325791A1 (en) * | 2013-05-01 | 2014-11-06 | Aes Engineering Ltd. | Annular seal cavity throat bushing |
| CN205277699U (en) * | 2015-12-31 | 2016-06-01 | 北京金风科创风电设备有限公司 | Wind generating set's bearing seal filtration and aerogenerator |
| CN105605226A (en) * | 2016-03-28 | 2016-05-25 | 安徽力诺环保工程有限公司 | Sealing device capable of preventing silt |
| CN106402014A (en) * | 2016-10-24 | 2017-02-15 | 宜兴市宙斯泵业有限公司 | Side-suction anti-abrasion centrifugal pump |
| CN206753916U (en) * | 2017-03-22 | 2017-12-15 | 宜兴市宙斯泵业有限公司 | A kind of Centrifugal liquid pump |
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