CN104110497A - Rotary shaft sealing structure of electric water filter - Google Patents
Rotary shaft sealing structure of electric water filter Download PDFInfo
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- CN104110497A CN104110497A CN201410305339.2A CN201410305339A CN104110497A CN 104110497 A CN104110497 A CN 104110497A CN 201410305339 A CN201410305339 A CN 201410305339A CN 104110497 A CN104110497 A CN 104110497A
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- water
- rotatingshaft
- bearing
- electric water
- water filter
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Abstract
The invention provides a rotary shaft sealing structure of an electric water filter. A '2+1+3' sealing structure is used and replaces an original single-framework sealing structure, and mud and water leaked to the position of a rotary shaft sealing device can be eliminated. A plurality of through holes are formed in an annular wall between an inner ring and an outer ring of a water guiding ring, a water guiding passage is machined inside a packing box, one end of the water guiding passage is communicated with the outer ring of the water guiding ring, the other end of the water guiding passage is communicated with a water discharging and guiding pipe, and leaked water can be guided outside a barrel body through the water discharging and guiding pipe. If a small amount of water leaks towards a bearing chamber, when flowing to the water guiding ring, the water can be discharged by the water discharging and guiding pipe and can not enter the bearing chamber, so that the purpose of protecting a bearing from being rusted by water is achieved. In this way, the sealing performance of a rotary shaft is improved, damage to a speed reducer support is reduced, and the operation reliability of the electric water filter is obviously improved.
Description
Technical field
The invention belongs to sealing configuration field, particularly a kind of electric water filter rotating shaft-seal structure.
Background technique
Electric water filter is the visual plant of steam turbine coagulator device, and its effect is to filter cooling water, removes the foreign material that may stop up heat exchanger, improves the turbidity test of heat exchanger water-cooling tube, improves heat exchange efficiency, reduces gross coal consumption rate.Electric water filter structure as shown in Figure 1.It is partly comprised of speed reducer, speed reducer connecting seat, rotating shaft-seal device, upper cylinder, lower cylinder body, rotatingshaft, bearing gland, bearing, filter core water-inlet cavity, filter core, filter core water-inlet cavity dunnage, sewage backwash bucket, electronic blowdown valve etc.This water filter, utilizes negative pressure to produce repercussion effect, cleans out foreign material in water.Cooling water is inner toward flows outside from filter core, and rubbish amasss on filter core Intranet wall.Ten filter cores are uniformly distributed along the circumference, and during blowdown, sewage backwash bucket is aimed at a certain filter core, and electronic blowdown valve is opened in rear drain pipe and formed negative pressure, and cooling water is inner to flowing into by filter core outer counter, from sewage backwash bucket, discharges, and the rubbish on filter core Intranet wall is flushed away.After the certain hour of interval, speed reducer drives sewage backwash bucket to turn to next filter core, and this filter core starts cleaning ... it is a Cleaning period that 10 filter cores have been cleared up successively, cleans complete electronic blowdown valve and closes.When sewage backwash bucket does not rotate, rubbish amasss on filter core inwall, detects filter core front and back pressure reduction, when pressure reduction is elevated to definite value, shows that rubbish gathering is more, automatically starts liquidation procedures.
On January 24th, 2012, come into operation #3 machine electric water filter soon, its speed reducer connecting seat flange is explosion.On February 9th, 2012, the speed reducer assembly that producer is newly sent installs, energising trial run, the explosion again of speed reducer connecting seat flange.Problem to twice explosion of #3 machine electric water filter speed reducer connecting seat flange, equipment portion steam turbine profession organizes the relevant personnel to carry out the cause analysis damaging.Think the defect of impact and rub has occurred in electric water filter cylindrical shell, impact and rub causes drag torque to increase, and finally causes the explosion of body weak link.
According to the working principle of electric water filter, as shown in Figure 2, after electronic blowdown valve is opened, because sewage backwash bucket inside is negative pressure, therefore inside and outside wall just forms pressure reduction.According to figure sewage backwash bucket shape shape and size, that can calculate sewage backwash bucket meets head piece bearing area.According to pressure difference and bearing area, can calculate the responsive to axial force that sewage backwash bucket is approximately subject to 1510N when the normal blowdown, axial force direction is by lower sensing.During normal blowdown, this axial force always tries hard to make sewage backwash bucket and axle direction play upward, and the load that this has just aggravated bearing, makes it more fragile.The existence of this axial force is that the working principle by electric water filter determines, can not eliminate it.When transformation, should fully pay attention to the impact of this axial force.
Disintegration rotating shaft-seal device, finds to have filled silt and water in bearing chamber, breaks in hoodle fragmentation and the outer ring of bearing.Think that bearing chamber only has the sealing effect of a reinforced seal cushion rubber poor, be to cause silt and water to enter the reason of bearing chamber.Silt and water make bearing hoodle and outer ring lose lubricated and produce corrosion hole point, and then the bearing local pressure that is in operation is increased, and are broken in outer ring.After bearing hoodle and outer ring fragmentation, cause the axially locating of axle without dependence, when electronic blowdown valve is opened, now act on axial force on sewage backwash bucket and make sewage backwash bucket play upwards together with axle.When axial movement value surpasses 4mm, sewage backwash bucket just touches mill with water-inlet cavity cover plate, touches mill and will occur stuckly, just makes drag torque considerably beyond design load (102kg.m) after stuck.From strip inspection on February 10th, 2012, find that sewage backwash bucket and water-inlet cavity cover plate have the phenomenon of touching mill to judge, sewage backwash bucket and water-inlet cavity cover plate are stuck is to cause speed reducer transmission of torque link weakness--the reason of speed reducer connecting seat flange explosion.And cause sewage backwash bucket and the stuck basic reason of water-inlet cavity cover plate, be that the sealing configuration of rotating shaft-seal device is unreasonable.Connecting bearing flange material is cast iron, and twice explosion occurs, and its strength deficiency is described.
Therefore need to improve the rotating shaft-seal device of electric water filter, to guarantee normal production run.
Summary of the invention
For addressing the above problem, the invention provides a kind of electric water filter rotating shaft-seal structure, described electric water filter comprises cylindrical shell and rotatingshaft, wherein, described cylindrical shell is hollow structure, and has a neck, described cylinder neck has an opening, described rotatingshaft passes described opening and extend into the inside of described cylindrical shell, between described rotatingshaft and described cylinder neck, by sealing configuration, realizes sealing, and described sealing configuration comprises:
Stuffing box, it is arranged between described cylinder neck and described rotatingshaft, and outside described rotatingshaft and described stuffing box, side is provided with bearing;
Five backbone sealing rings, are arranged on the outside of described rotatingshaft by described stuffing box, be successively set on the below of described bearing;
Diversion ring, it is sheathed on the outside of described rotatingshaft, be arranged on from down to up between second backbone sealing ring and the 3rd backbone sealing ring, with this " 2+1+3 " sealing configuration, replace single original reinforced seal structure, can eliminate rotating shaft-seal device place and leak into silt and water.
In annular wall between the inner and outer rings of described diversion ring, offer a plurality of through holes that run through, the inside of stuffing box is processed with catchment channel, one end of catchment channel is communicated to the outer shroud of described diversion ring, and the other end is communicated to row's aqueduct, by row's aqueduct, is communicated to the external world.
If there is minor amount of water to leak in bearing chamber, while flowing to diversion ring, by aqueduct, to be discharged, water does not enter bearing chamber, thereby plays protection bearing not by scale erosion object.
Preferably, in described electric water filter rotating shaft-seal structure,
On the circumference of described diversion ring, along it, be radially evenly provided with a plurality of through holes;
On described stuffing box, the outer ring position of corresponding diversion ring arranges horizontal through hole, and horizontal through hole outer surface blocks with plug welding;
On described stuffing box, corresponding horizontal through hole position arranges vertical through hole, and vertical through hole and horizontal through hole connect, and form a catchment channel,
The external aqueduct in vertical through hole bottom.
Preferably, in described electric water filter rotating shaft-seal structure, described rotatingshaft is necked part corresponding to five backbone sealing rings and diversion ring one section, and described necked part has the wearing layer that stainless steel material is made.Described necked part is with lathe by the little 2mm of external diameter car, and built-up welding stainless steel electrode, then carries out retrofit with lathe to the necked part of welding, returns to original outer diameter, and obtaining surface flatness is stainless necked part higher than other parts and material.Can reduce surface roughness like this, and axle journal is because of non-corrosive, therefore it is very little that backbone sealing ring is worn and torn, is beneficial to the life-span that extends backbone sealing ring, guarantees sealing effect.
Preferably, in described electric water filter rotating shaft-seal structure, the top of described rotatingshaft is connected to a speed reducer, the top of described cylinder neck is provided with a speed reducer bearing, described speed reducer is arranged on described speed reducer bearing, described speed reducer bearing, for to be made by carbon steel material, improves and connects bearing intensity.
The invention provides a kind of electric water filter rotating shaft-seal structure, described electric water filter comprises cylindrical shell and rotatingshaft, wherein, described cylindrical shell is hollow structure, and there is a neck, described cylinder neck has an opening, described rotatingshaft passes described opening and extend into the inside of described cylindrical shell, between described rotatingshaft and described cylinder neck, by sealing configuration, realize sealing, described sealing configuration comprises: stuffing box, it is arranged between described cylinder neck and described rotatingshaft, and outside described rotatingshaft and described stuffing box, side is provided with bearing; Five backbone sealing rings, are arranged on the outside of described rotatingshaft by described stuffing box, be successively set on the below of described bearing; Diversion ring, it is sheathed on the outside of described rotatingshaft, be arranged on from down to up between second backbone sealing ring and the 3rd backbone sealing ring, with this " 2+1+3 " sealing configuration, replace single original reinforced seal structure, can eliminate rotating shaft-seal device place and leak into silt and water.In annular wall between the inner and outer rings of described diversion ring, offer a plurality of through holes that run through, the inside of stuffing box is processed with catchment channel, one end of catchment channel is communicated to the outer shroud of described diversion ring, and the other end is communicated to row's aqueduct, by row's aqueduct, is communicated to the external world.
If there is minor amount of water to leak in bearing chamber, while flowing to diversion ring, by aqueduct, to be discharged, water does not enter bearing chamber, thereby plays protection bearing not by scale erosion object.Like this, both improve the sealing of rotatingshaft, also reduced the damage to speed reducer bearing simultaneously, obviously improved the operational reliability of electric water filter.
Accompanying drawing explanation
Fig. 1 is the structural representation before electric water filter improvement in the present invention;
Fig. 2 is the structural representation of sewage backwash bucket in the present invention;
Fig. 3 is the structural representation before electric water filter rotating shaft-seal architecture advances of the present invention;
Fig. 4 is the structural representation after electric water filter rotating shaft-seal architecture advances of the present invention;
Fig. 5 is the sectional view of diversion ring in electric water filter rotating shaft-seal structure of the present invention;
Fig. 6 is the plan view of diversion ring in electric water filter rotating shaft-seal structure of the present invention;
Fig. 7 is the sectional view after stuffing box processing through hole in electric water filter rotating shaft-seal structure of the present invention;
Fig. 8 is the structural representation of catchment channel in stuffing box in electric water filter rotating shaft-seal structure of the present invention;
Fig. 9 is the structural representation after electric water filter improvement in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, to make those skilled in the art can implement according to this with reference to specification word.
As shown in Figure 1, the electric water filter before improvement is partly comprised of speed reducer 1, speed reducer connecting seat 2, rotating shaft-seal structure 5, cylindrical shell 7, rotatingshaft 8, bearing cap 3, bearing 4, filter core 6, dunnage 9, sewage backwash bucket 10, sewage draining valve 11 etc.Described rotatingshaft 8 comprises a part in the outer part of cylinder and cylinder, and wherein, the outer part of described cylinder comprises and the coaxial speed reducer connecting seat being connected 2 of described rotatingshaft 8 and speed reducer 1 from the bottom to top, and be arranged on described bearing 4 tops and with the fixing bearing cap 3 of stuffing box; In described cylindrical shell 7, be fixed with dunnage 9, in described dunnage 9, Circle-Array is shown a plurality of filter cores 6; On the sidewall of described cylindrical shell 7, be also provided with cooling water intake and water outlet, wherein said cooling water intake is lower than the horizontal plane at described dunnage 9 places, and described water outlet is higher than the horizontal plane at described dunnage 9 places; In described cylinder, the end of part is fixedly connected with a sewage backwash bucket 10, and the lower end of sewage backwash bucket 10 is also sealedly connected with a blow-off line, and the part that blow-off line stretches out outside described cylindrical shell 7 is provided with a sewage draining valve 11.Sewage backwash bucket 10 rotates under the drive of described rotatingshaft 8, and the upper end of sewage backwash bucket 10 rests on the bottom 2min of some filter cores 6 in rotation process, sewage draining valve 11 is opened simultaneously, cooling water flows out and the dirt on described filter core 6 filter screen walls is washed away under suction function, complete blowdown, when filter core described in each 6 completes after blowdown, close sewage draining valve 11.
According to the working principle of electric water filter, after sewage draining valve 11 is opened, because sewage backwash bucket 10 inside are negative pressure, therefore inside and outside wall just forms pressure reduction.According to Fig. 2 sewage backwash bucket shape shape and size, that can calculate sewage backwash bucket 10 meets head piece bearing area.According to pressure difference and bearing area, can calculate the responsive to axial force that sewage backwash bucket 10 is approximately subject to 1510N when the normal blowdown, axial force direction is by lower sensing.During normal blowdown, this axial force always tries hard to make sewage backwash bucket and axle direction play upward, and the load that this has just aggravated bearing 4, makes it more fragile.The existence of this axial force is that the working principle by electric water filter determines, can not eliminate it.
Electric water filter rotating shaft-seal structure 3 before improvement as shown in Figure 3, has a backbone sealing ring 14 in the arranged outside of described rotatingshaft 8, and sealing effect is not good, makes to have filled silt and water in bearing chamber, breaks in hoodle fragmentation and the outer ring of bearing.Silt and water make bearing hoodle and outer ring lose lubricated and produce corrosion hole point, and then bearing 4 local pressure that is in operation is increased, and are broken in outer ring.After bearing hoodle and outer ring fragmentation, cause the axially locating of axle without dependence, when sewage draining valve 11 is opened, now act on axial force on sewage backwash bucket 10 and make sewage backwash bucket play upwards together with axle.When axial movement value surpasses 4mm, sewage backwash bucket 10 just touches mill with dunnage 9, touches mill and will occur stuckly, just makes drag torque considerably beyond design load (102kg.m) after stuck.From strip inspection on February 10th, 2012, find that sewage backwash bucket 10 and dunnage 9 have the phenomenon of touching mill to judge, sewage backwash bucket 10 is stuck with dunnage 9 is to cause speed reducer transmission of torque link weakness--the reason of speed reducer connecting seat flange explosion.And cause the stuck basic reason of sewage backwash bucket 10 and dunnage 9, be that the sealing configuration of rotating shaft-seal device is unreasonable.
As shown in Fig. 4 and Fig. 9, the invention provides a kind of electric water filter rotating shaft-seal structure, described electric water filter comprises cylindrical shell 7 and rotatingshaft 8, wherein, described cylindrical shell 7 is hollow structure, and has a neck, described cylinder neck has an opening, described rotatingshaft 8 passes described opening and extend into the inside of described cylindrical shell 7, between described rotatingshaft 8 and described cylinder neck, by sealing configuration 3, realizes sealing, and described sealing configuration 3 comprises:
Stuffing box 15, it is arranged between described cylinder neck and described rotatingshaft 8, and outside described rotatingshaft 8 and described stuffing box 15, side is provided with bearing 4;
Five backbone sealing rings 14, are arranged on the outside of described rotatingshaft 8 by described stuffing box 15, be successively set on the below of described bearing 4;
Diversion ring 16, it is sheathed on the outside of described rotatingshaft 8, be arranged on from down to up between second backbone sealing ring and the 3rd backbone sealing ring, with this " 2+1+3 " sealing configuration, replace single original reinforced seal structure, can eliminate rotating shaft-seal structure place and leak into silt and water.As shown in Figure 5 and Figure 6,
In annular wall between the inner and outer rings of described diversion ring 16, offer a plurality of through holes that run through, the inside of stuffing box is processed with catchment channel, one end of catchment channel is communicated to the outer shroud of described diversion ring, and the other end is communicated to row's aqueduct, by row's aqueduct, is communicated to the external world.If there is minor amount of water to leak in bearing chamber, while flowing to diversion ring, by aqueduct, to be discharged, water does not enter bearing chamber, thereby plays protection bearing not by scale erosion object.
In described electric water filter rotating shaft-seal structure,
On the circumference of described diversion ring 16, along it, be radially evenly provided with a plurality of through holes;
As shown in Figure 7 and Figure 8, on described stuffing box 15, the outer ring position of corresponding diversion ring 16 arranges horizontal through hole 12, and horizontal through hole 12 outer surfaces block with plug welding;
On described stuffing box 15, corresponding horizontal through hole 12 positions arrange vertical through hole 13, and vertical through hole 13 connects with horizontal through hole 12, forms a catchment channel,
The external aqueduct 11 in vertical through hole 13 bottoms.
In described electric water filter rotating shaft-seal structure, described rotatingshaft 8 is necked part corresponding to five backbone sealing rings 14 and diversion ring 16 one section, and described necked part has the wearing layer that stainless steel material is made.Described necked part is with lathe by the little 2mm of external diameter car, and built-up welding stainless steel electrode, then carries out retrofit with lathe to the necked part of welding, returns to original outer diameter, and obtaining surface flatness is stainless necked part higher than other parts and material.Can reduce surface roughness like this, and axle journal is because of non-corrosive, therefore it is very little that backbone sealing ring is worn and torn, is beneficial to the life-span that extends backbone sealing ring, guarantees sealing effect.
In described electric water filter rotating shaft-seal structure, the top of described rotatingshaft 8 is connected to a speed reducer 1, the top of described cylinder neck is provided with a speed reducer bearing 2, described speed reducer 1 is arranged on described speed reducer bearing 2, described speed reducer bearing 2, for to be made by carbon steel material, improves its intensity.
In order to check the effect of electric water filter long-time running after transformation, its operation conditions of tracing observation always so far from February, 2012 #3 machine electric water filter retrofit of axial seal, does not find that aqueduct there are flowing out in these 2 years.In May, 2014 #3 machine light maintenance, in order further to confirm the performance after electric water filter retrofit of axial seal, has opened rotating shaft-seal device, and in bearing chamber, without silt and water, bearing is also without wearing and tearing.The check of disintegrating shows that #3 machine electric water filter retrofit of axial seal is successful.
It is the basic reason that causes speed reducer connecting seat to damage that negative pressure reverse rinses the shaft seal of electric water filter unreliable.The modification measures of taking in conjunction with water filter actual conditions, to eliminating the damage of speed reducer connecting seat, it is fairly obvious improving electric water filter operational reliability.
The invention provides a kind of electric water filter rotating shaft-seal structure, described electric water filter comprises cylindrical shell and rotatingshaft, wherein, described cylindrical shell is hollow structure, and there is a neck, described cylinder neck has an opening, described rotatingshaft passes described opening and extend into the inside of described cylindrical shell, between described rotatingshaft and described cylinder neck, by sealing configuration, realize sealing, described sealing configuration comprises: stuffing box, it is arranged between described cylinder neck and described rotatingshaft, and outside described rotatingshaft and described stuffing box, side is provided with bearing; Five backbone sealing rings, are arranged on the outside of described rotatingshaft by described stuffing box, be successively set on the below of described bearing; Diversion ring, it is sheathed on the outside of described rotatingshaft, be arranged on from down to up between second backbone sealing ring and the 3rd backbone sealing ring, with this " 2+1+3 " sealing configuration, replace single original reinforced seal structure, can eliminate rotating shaft-seal device place and leak into silt and water.If there is minor amount of water to leak in bearing chamber, while flowing to diversion ring, by aqueduct, to be discharged, water does not enter bearing chamber, thereby plays protection bearing not by scale erosion object.Like this, both improve the sealing of rotatingshaft, also reduced the damage to speed reducer bearing simultaneously, obviously improved the operational reliability of electric water filter.
Although embodiment of the present invention are open as above, but it is not restricted to listed utilization in specification and mode of execution, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other modification, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend of describing.
Claims (4)
1. an electric water filter rotating shaft-seal structure, described electric water filter comprises cylindrical shell and rotatingshaft, wherein, described cylindrical shell is hollow structure, and has a neck, and described cylinder neck has an opening, described rotatingshaft passes described opening and extend into the inside of described cylindrical shell, it is characterized in that, between described rotatingshaft and described cylinder neck, by sealing configuration, realize sealing, described sealing configuration comprises:
Stuffing box, it is arranged between described cylinder neck and described rotatingshaft, and outside described rotatingshaft and described stuffing box, side is provided with bearing;
Five backbone sealing rings, are arranged on the outside of described rotatingshaft by described stuffing box, be successively set on the below of described bearing;
Diversion ring, the outside that it is sheathed on described rotatingshaft, is arranged on from down to up between second backbone sealing ring and the 3rd backbone sealing ring,
In annular wall between the inner and outer rings of described diversion ring, offer a plurality of through holes that run through, the inside of stuffing box is processed with catchment channel, one end of catchment channel is communicated to the outer shroud of described diversion ring, and the other end is communicated to row's aqueduct, by row's aqueduct, is communicated to the external world.
2. electric water filter rotating shaft-seal structure as claimed in claim 1, is characterized in that,
On the circumference of described diversion ring, along it, be radially evenly provided with a plurality of through holes;
On described stuffing box, the outer ring position of corresponding diversion ring arranges horizontal through hole, and horizontal through hole outer surface blocks with plug welding;
On described stuffing box, corresponding horizontal through hole position arranges vertical through hole, and vertical through hole and horizontal through hole connect, and form a catchment channel,
The external aqueduct in vertical through hole bottom.
3. electric water filter rotating shaft-seal structure as claimed in claim 2, is characterized in that, described rotatingshaft is necked part corresponding to five backbone sealing rings and diversion ring one section, and described necked part has the wearing layer that stainless steel material is made.
4. electric water filter rotating shaft-seal structure as claimed in claim 1, it is characterized in that, the top of described rotatingshaft is connected to a speed reducer, the top of described cylinder neck is provided with a speed reducer bearing, described speed reducer is arranged on described speed reducer bearing, and described speed reducer bearing is for to be made by carbon steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410305339.2A CN104110497B (en) | 2014-06-30 | 2014-06-30 | A kind of electric water filter rotating shaft-seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410305339.2A CN104110497B (en) | 2014-06-30 | 2014-06-30 | A kind of electric water filter rotating shaft-seal structure |
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| Publication Number | Publication Date |
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| CN104110497A true CN104110497A (en) | 2014-10-22 |
| CN104110497B CN104110497B (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410305339.2A Expired - Fee Related CN104110497B (en) | 2014-06-30 | 2014-06-30 | A kind of electric water filter rotating shaft-seal structure |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7618172U1 (en) * | 1975-06-17 | 1976-12-16 | Fa. Dr.-Ing. Hans Mueller, Maennedorf (Schweiz) | PRESSURE DISC FILTERS, IN PARTICULAR CENTRIFUGAL CLEANING FILTERS |
| JPS5781801A (en) * | 1980-11-10 | 1982-05-22 | Tokuyama Sekiyu Kagaku Kk | Gland sealing method for rotary type evaporator |
| CN2623941Y (en) * | 2002-06-05 | 2004-07-07 | 卢亚东 | Waterproof sealing structure of bearing |
| CN201088884Y (en) * | 2007-09-14 | 2008-07-23 | 自贡市真空滤油机总厂 | Water filter capable of cleaning and discharging pollution automatically |
| CN201177040Y (en) * | 2008-03-12 | 2009-01-07 | 吴仁道 | Filter stirring shaft seal structure |
| CN201621285U (en) * | 2010-03-10 | 2010-11-03 | 楼生友 | Sealed rotating shaft |
| CN204061891U (en) * | 2014-06-30 | 2014-12-31 | 大唐桂冠合山发电有限公司 | A kind of electric water filter rotating shaft-seal structure |
-
2014
- 2014-06-30 CN CN201410305339.2A patent/CN104110497B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7618172U1 (en) * | 1975-06-17 | 1976-12-16 | Fa. Dr.-Ing. Hans Mueller, Maennedorf (Schweiz) | PRESSURE DISC FILTERS, IN PARTICULAR CENTRIFUGAL CLEANING FILTERS |
| JPS5781801A (en) * | 1980-11-10 | 1982-05-22 | Tokuyama Sekiyu Kagaku Kk | Gland sealing method for rotary type evaporator |
| CN2623941Y (en) * | 2002-06-05 | 2004-07-07 | 卢亚东 | Waterproof sealing structure of bearing |
| CN201088884Y (en) * | 2007-09-14 | 2008-07-23 | 自贡市真空滤油机总厂 | Water filter capable of cleaning and discharging pollution automatically |
| CN201177040Y (en) * | 2008-03-12 | 2009-01-07 | 吴仁道 | Filter stirring shaft seal structure |
| CN201621285U (en) * | 2010-03-10 | 2010-11-03 | 楼生友 | Sealed rotating shaft |
| CN204061891U (en) * | 2014-06-30 | 2014-12-31 | 大唐桂冠合山发电有限公司 | A kind of electric water filter rotating shaft-seal structure |
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| CN104110497B (en) | 2016-04-13 |
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