CN103388580B - Split mechanical seal and the two screw pump of Split mechanical seal is housed - Google Patents
Split mechanical seal and the two screw pump of Split mechanical seal is housed Download PDFInfo
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- CN103388580B CN103388580B CN201310333000.9A CN201310333000A CN103388580B CN 103388580 B CN103388580 B CN 103388580B CN 201310333000 A CN201310333000 A CN 201310333000A CN 103388580 B CN103388580 B CN 103388580B
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- ring
- seal
- split
- stamping steel
- steel ribbon
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- 238000007789 sealing Methods 0.000 claims abstract description 66
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 56
- 239000010959 steel Substances 0.000 claims abstract description 56
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 8
- 238000012856 packing Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 8
- 230000008439 repair process Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 10
- 230000009471 action Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention discloses a kind of Split mechanical seal and two screw pump, Split mechanical seal comprises sealing seat, described sealing seat has two parallel installation passages, be respectively used to the screw rod wearing two screw pump, every bar is installed in passage and is provided with the stationary ring and rotating ring that cooperatively interact, and described sealing seat and stationary ring and rotating ring are splits part.The housing of twin-screw pump and screw rod pedestal are cut into upper and lower two parts, and the first end cap, second end cap of this two screw pump are and split part.By the rotating ring of the sealing seat of two screw rods, the stationary ring of subdivision and subdivision can be installed, further increase sealing installation and maintenance efficiency, and use Stamping Steel Ribbon to seal split surface, improve the effect of split surface sealing.By housing, screw rod pedestal, the first end cap and the second end cover designs are become split type structure, make two screw pump more convenient and swift when keeping in repair.
Description
Technical field
The present invention relates to the mechanical seal that rotating machinery uses, is Split mechanical seal in particular.The present invention also relates to a kind of two screw pump installing above-mentioned Split mechanical seal.
Background technique
Screw pump is that the spatial volume that engages relying on the pump housing and screw rod to be formed changes and the mobile rotary pump carried liquid or make it supercharging.Screw pump is divided into helical rotor pump, two screw pump and three screw pump etc. by screw rod number.When active bolt rotary, drive and rotate together with the driven screw of its engagement, the screw rod engagement spatial volume of suction chamber one end increases gradually, and pressure reduces.Liquid enters engagement spatial volume under differential pressure action.When volume increase to maximum and form a Seal cage time, liquid just moves vertically continuously, until discharge side one end in Seal cage one by one.At this moment the screw rod engagement spatial volume of discharge side one end reduces gradually, and is discharged by liquid.The working principle of screw pump is similar to gear pump, just structurally instead of gear with screw rod.
Twin-screw is widely used in the various industries such as oil, chemical industry, metallurgy, iron and steel, electric power, boats and ships, pharmacy, food, building materials, has the features such as Applicable media is many, conveying scope is wide.Usually, its shaft end seal can select packing seal and mechanical seal etc.Wherein mechanical seal have leakage less, the advantage such as long service life, installation and maintenance are convenient.
In actual use, the mode that the mechanical seal of two screw pump all adopts two mechanical seals to install separately, radial distance due to twin shaft is subject to the size restrictions of screw rod, if adopt two mechanical seals, often there is interference phenomenon in the mechanical sealing base of screw pump, brings inconvenience to design and assembling.
In the application of some single shaft shaft seals, in order to overhaul conveniently, there is Split mechanical seal.Authorization Notice No. is that the patent documentation of CN2742241Y proposes a kind of Split mechanical seal, sealing one end is the connection Seal cage that inside has a given shape groove, it the other end relevant position is then a front end has connecting groove joint with similar shape boss and rear portion, joint two-part exterior edge face is made up of the structure with ring arc projection, when mounted joint press-in is connected in Seal cage, reach the object of sealing, and can change along with pressure, automatically adjust sealing effect.But it is high that this patent documentation proposes Sealing required precision, complex structure, and cost is higher, and do not embody the partition patterns of mechanical sealing base.
Sum up relevant Split mechanical seal, in partition patterns, split mechanical seals still exists a lot of problem, to the subdivision also imperfection of rotating ring, stationary ring, still have the space of improvement.
Application publication number is that the patent documentation of CN101725712A discloses a kind of still and is finished full Split mechanical seal, still is finished full Split mechanical seal, Integral mechanical sealing is modified into complete Split mechanical seal, and simultaneously ensure sealing effect and manufacturing simple, it is that a pair seal ring combinationally uses realization sealing that seal ring of moving ring, stationary ring seal ring and stationary seat flange install seal ring, and also adopt seal ring to seal to the leakage face, face of splitting newly increased, achieve the replacing completing mechanical sealing element when not dismantling component on axle.But this patent documentation only provides the Split mechanical seal being applicable to single shaft, because two screw pump is by synchromesh gear drive screw turns, screw rod spacing is restricted, and often installing space is not enough to adopt two Split mechanical seals, cannot use.
Summary of the invention
For the problems referred to above, the invention provides a kind of Split mechanical seal with two installation passage, solve the problem that existing Split mechanical seal can not be applicable to two screw pump very well.
Another technical problem that will solve of the present invention is to provide a kind of two screw pump Split mechanical seal being housed, being convenient to demolition and maintenance.
The technological scheme that the present invention takes is as follows: a kind of Split mechanical seal, comprise sealing seat, described sealing seat has two parallel installation passages, be respectively used to two screw rods wearing two screw pump, every bar is installed in passage and is provided with the stationary ring and rotating ring that cooperatively interact, and described sealing seat and stationary ring and rotating ring are splits part.
Split mechanical seal has two to install passage, has effectively saved space, not by the restriction of screw rod spacing, can seal two screw rods, and convenient when two screw pump is safeguarded.
The split surface splitting part of described sealing seat, stationary ring, rotating ring adopts Stamping Steel Ribbon sealing, two one of them of splitting in part of sealing seat, stationary ring, rotating ring are provided with the groove placing Stamping Steel Ribbon, and the outer rim of described stationary ring is provided with the stationary ring seal ring matched with sealing seat; The inner edge of described rotating ring is provided with the seal ring of moving ring matched with screw rod, and described stationary ring seal ring and seal ring of moving ring are splits part.Seal ring, Stamping Steel Ribbon have certain amount of deformation, split when part is integrally combined and can play seal action, prevent liquid from leaking out from split surface, and splitting the fastening employing of merging of part, common to split connecting means just passable.
It should be noted that, rotating ring can directly coordinate with screw rod, also can be coordinated by axle sleeve, and when axle sleeve coordinates, the seal ring of moving ring that rotating ring inner edge is provided with matches with axle sleeve, and axle sleeve is sleeved in screw rod, and is sealed by sleeve sealing circle and screw rod.
The split surface that two stationary rings split part is provided with stationary ring Stamping Steel Ribbon, and one end of described stationary ring Stamping Steel Ribbon extends to the rubbing surface that rotating ring contacts with stationary ring, and stationary ring Stamping Steel Ribbon contacts with the inner ring of stationary ring seal ring and seals.Stationary ring Stamping Steel Ribbon can seal to the leakage stationary ring seal ring the rubbing surface that stationary ring split surface contacts from stationary ring with rotating ring.
As preferably, the arranged direction of stationary ring Stamping Steel Ribbon is parallel to the axis that passage is installed at place.
The split surface that two rotating rings split part is provided with ring seal bar, and one end of described ring seal bar extends to the rubbing surface that rotating ring contacts with stationary ring, and the other end contacts with seal ring of moving ring and seals.Ring seal bar can seal to the leakage seal ring of moving ring the rubbing surface that rotating ring split surface contacts from stationary ring with rotating ring.
The axial end place of sealing seat is provided with and is in the seal washer that two are installed channels peripheral, the split surface that two sealing seats split part is provided with the first Stamping Steel Ribbon and the second sealing, described first Stamping Steel Ribbon contacts with seal washer and seals, and contacts with the outer ring of stationary ring seal ring and seal; Described second sealing is in two and installs between passage, and this second Stamping Steel Ribbon is to contact with two stationary ring seal rings installed in passage and seals.First Stamping Steel Ribbon, the second Stamping Steel Ribbon can on sealing seat split surface from sealing seat seal ring to stationary ring seal ring leakage seal.
As preferably, what passage installed by described first Stamping Steel Ribbon along place has extended radially inwardly branch, to be contacted seal by this branch with the outer ring of stationary ring seal ring.
Another theme of the present invention is a kind of two screw pump, this two screw pump comprises the housing being equipped with two screw rods, and being arranged on the screw rod pedestal matched with two screw rods in housing, the matching part of described two screw rods and housing is provided with Split mechanical seal recited above.
Described Split mechanical seal is two covers, and wherein the sealing seat of a set of Split mechanical seal is fixed on the outer wall of housing side, and the side of sealing seat housing is dorsad closed by first end cap seal;
The sealing seat of another set of Split mechanical seal is fixed on the outer wall of housing opposite side, sealing seat dorsad housing side by the second end cap close;
Described first end cap is for splitting part, this splits the first groove that part split surface is provided with the first end cap Stamping Steel Ribbon and installs this first end cap Stamping Steel Ribbon, the axial end of the first end cap is provided with the first packing ring, described first end cap Stamping Steel Ribbon and the first washer contacts seal, and one end extends to the contact jaw that screw rod passes the first end cap.First end cap Stamping Steel Ribbon can prevent liquid from leaking out from split surface, and split type structure can make two screw pump more efficient and convenient in maintenance.
Described two screw rods are linked by synchromesh gear, described synchromesh gear is in the second end cap, this second end cap is for splitting part, this splits the second groove that part split surface is provided with the second end bracket enclosed bar and installs this second end bracket enclosed bar, the axial end of the second end cap is provided with the second packing ring, described second end bracket enclosed bar quantity is 1, and these the second end bracket enclosed bar two ends all seal with the second washer contacts.Second end bracket enclosed bar can prevent liquid from leaking out from split surface, and split type structure can make two screw pump more efficient and convenient in maintenance.
Described housing and screw rod pedestal are axially split type structure.Axially split type structure make two screw pump keep in repair time can be more convenient.
The invention has the beneficial effects as follows: Split mechanical seal of the present invention, by the rotating ring of the sealing seat of two screw rods, the stationary ring of subdivision and subdivision can be installed, further increase sealing installation and maintenance efficiency, and use Stamping Steel Ribbon to seal split surface, improve the effect of split surface sealing.The two screw pump that Split mechanical seal is housed of the present invention, by housing, screw rod pedestal, the first end cap and the second end cover designs are become split type structure, makes two screw pump more convenient and swift when keeping in repair.
Accompanying drawing explanation
Fig. 1 is the sectional drawing of the two screw pump that Split mechanical seal is housed;
Fig. 2 is the sectional drawing that mechanical seal is arranged on two screw pump;
Fig. 3 stationary ring split surface front view;
Fig. 4 stationary ring split surface side view;
Fig. 5 rotating ring split surface front view;
Fig. 6 stationary ring split surface side view;
Fig. 7 sealing seat split surface front view;
Fig. 8 sealing seat split surface side view;
Fig. 9 first end cap split surface front view;
Figure 10 first end cap split surface side view;
Figure 11 second end cap split surface front view;
Figure 12 second end cap split surface side view.
1. twin screw components, 2. the first end cap, 3. rolling bearing, 4. sealing seat, 5. stationary ring, 6. rotating ring, 7. axle sleeve, 8. screw rod pedestal, 9. housing, 10. rotating ring stage clip, 11. synchromesh gears, 12. second end caps, 14. first Stamping Steel Ribbons, 15. seal washers, 16. stationary ring seal rings, 17. stationary ring Stamping Steel Ribbons, 20. ring seal bars, 21. seal ring of moving ring, 22. second Stamping Steel Ribbons, 24. first packing rings, 25. first end cap Stamping Steel Ribbons, 27. second packing rings, 28. second end bracket enclosed bars.
Embodiment
As Fig. 1, shown in 2, a kind of Split mechanical seal, comprise sealing seat 4, sealing seat 4 has two parallel installation passages, is respectively used to two screw rods wearing two screw pump, and every bar is installed in passage and is provided with the stationary ring 5 and rotating ring 6 that cooperatively interact, rotating ring 6 one end is connected with rotating ring stage clip 10, and sealing seat 4 and stationary ring 5 and rotating ring 6 are splits part.
The outer rim of stationary ring 5 is provided with the stationary ring seal ring 16 matched with sealing seat 4, the inner edge of rotating ring 6 is provided with the seal ring of moving ring 21 matched with axle sleeve 7, axle sleeve 7 is sleeved in screw rod, and is sealed by sleeve sealing circle and screw rod, and stationary ring seal ring 16 and seal ring of moving ring 21 are splits part.
As Fig. 3, shown in 4, the split surface splitting part of stationary ring 5 adopts stationary ring Stamping Steel Ribbon 17 to seal, and two one of them of splitting in part are provided with the stationary ring groove placing stationary ring Stamping Steel Ribbon 17.The arranged direction of stationary ring Stamping Steel Ribbon 17 is parallel to the axis that passage is installed at place, and stationary ring Stamping Steel Ribbon 17 one end extends to the rubbing surface that stationary ring 5 contacts with rotating ring 6, and stationary ring Stamping Steel Ribbon 17 contacts with the inner ring of stationary ring seal ring 16 and seals.Stationary ring Stamping Steel Ribbon 17 can seal to the leakage stationary ring seal ring 16 rubbing surface that stationary ring split surface contacts from stationary ring 5 with rotating ring 6.
As Fig. 5, shown in 6, the split surface splitting part of rotating ring 6 adopts ring seal bar 20 to seal, and two one of them of splitting in part are provided with the rotating ring groove placing ring seal bar 20.One end of ring seal bar 20 extends to the rubbing surface that stationary ring 5 contacts with rotating ring 6, and the other end contacts with seal ring of moving ring 21 and seals.Ring seal bar 20 can seal to the leakage seal ring of moving ring 21 rubbing surface that rotating ring split surface contacts from stationary ring 5 with rotating ring 6.
As Fig. 7, shown in 8, the axial end place of sealing seat 4 is provided with and is in the seal washer 15 that two are installed channels peripheral, the split surface splitting part of sealing seat 4 adopts the first Stamping Steel Ribbon 14, second Stamping Steel Ribbon 22 to seal, and two one of them of splitting in part are provided with the sealing seat groove of placement first Stamping Steel Ribbon 14, second Stamping Steel Ribbon 22.First Stamping Steel Ribbon 14 contacts with seal washer 15 and seals, and the first Stamping Steel Ribbon 14 passage is installed along place extended radially inwardly branch, to be contacted with the outer ring of stationary ring seal ring 15 by this branch and seal; Second Stamping Steel Ribbon 22 is in two and installs between passage, and this second Stamping Steel Ribbon 22 is to contact with two stationary ring seal rings 16 installed in passage and seals.First Stamping Steel Ribbon 14, second Stamping Steel Ribbon 22 can on sealing seat split surface from seal washer 15 to stationary ring seal ring 16 leakage seal.
Seal ring, Stamping Steel Ribbon have certain amount of deformation, split when part is integrally combined and can play seal action, prevent liquid from leaking out from split surface, split that the fastening employing of merging of part is common splits connecting means, as bolt connects.Split mechanical seal has two to install passage, has effectively saved space, not by the restriction of screw rod spacing, can seal two screw rods, and convenient when two screw pump is safeguarded.
As shown in Figure 1, a kind of two screw pump being provided with said Split mechanical seal above, this two screw pump comprises the first end cap 2, rolling bearing 3, two overlaps Split mechanical seal, housing 9, the screw arbor assembly 1 be made up of two screw rods, screw rod pedestal 8, synchromesh gear 11 and the second end cap 12, and housing 9 and screw rod pedestal 8 are axially split type structure.Axially split type structure make two screw pump keep in repair time can be more convenient.
The sealing seat of wherein a set of Split mechanical seal of two screw pump is fixed on the outer wall of housing 9 side, and the side of sealing seat housing 9 is dorsad closed by the first end cap 2; The sealing seat of another set of Split mechanical seal is fixed on the outer wall of housing 9 opposite side, and the side of sealing seat housing 9 is dorsad closed by the second end cap 12.As Fig. 9, shown in 10, first end cap 2 is for splitting part, this splits the first groove that part split surface is provided with the first end cap Stamping Steel Ribbon 25 and installs this first end cap Stamping Steel Ribbon 25, the axial end of the first end cap 2 is provided with the first packing ring 24, this the first end cap Stamping Steel Ribbon 25 comprises two parts, and these two parts all contact with the first packing ring 24 and seal, and one end extends to the contact jaw that screw rod passes the first end cap 2.First end cap Stamping Steel Ribbon 25 can prevent liquid from leaking out from split surface, and the structure of subdivision can make two screw pump more efficient and convenient in maintenance.As Figure 11, shown in 12, second end cap 12 is for splitting part, this splits the second groove that part split surface is provided with the second end bracket enclosed bar 28 and installs this second end bracket enclosed bar 28, the axial end of the second end cap 12 is provided with the second packing ring 27, second end bracket enclosed bar 28 quantity is 1, and these the second end bracket enclosed bar 28 two ends all contact with the second packing ring 27 and seal.Second end bracket enclosed bar 28 can prevent liquid from leaking out from split surface, and the structure of subdivision can make two screw pump more efficient and convenient in maintenance.
The two screw pump that Split mechanical seal is housed of the present invention, by housing 9, screw rod pedestal 8, first end cap 2 and the second end cap 12 are designed to split type structure, makes two screw pump more convenient and swift when keeping in repair.
Claims (8)
1. one kind is equipped with the two screw pump of Split mechanical seal, comprise the housing being equipped with two screw rods, and be arranged on the screw rod pedestal matched with two screw rods in housing, it is characterized in that, the matching part of described two screw rods and housing is provided with Split mechanical seal, described Split mechanical seal comprises sealing seat, described sealing seat has two parallel installation passages, be respectively used to two screw rods wearing two screw pump, every bar is installed in passage and is provided with the stationary ring and rotating ring that cooperatively interact, and described sealing seat and stationary ring and rotating ring are splits part;
Described Split mechanical seal is two covers, and wherein the sealing seat of a set of Split mechanical seal is fixed on the outer wall of housing side, and the side of sealing seat housing is dorsad closed by first end cap seal; The sealing seat of another set of Split mechanical seal is fixed on the outer wall of housing opposite side, sealing seat dorsad housing side by the second end cap close;
Described housing, screw rod pedestal are axially split type structure.
2. the two screw pump of Split mechanical seal is housed as claimed in claim 1, it is characterized in that: the split surface splitting part of described sealing seat, stationary ring, rotating ring adopts Stamping Steel Ribbon sealing, two one of them of splitting in part of sealing seat, stationary ring, rotating ring are provided with the groove placing Stamping Steel Ribbon, and the outer rim of described stationary ring is provided with the stationary ring seal ring matched with sealing seat; The inner edge of described rotating ring is provided with the seal ring of moving ring matched with screw rod, and described stationary ring seal ring and seal ring of moving ring are splits part.
3. the two screw pump of Split mechanical seal is housed as claimed in claim 2, it is characterized in that: the split surface that two stationary rings split part is provided with stationary ring Stamping Steel Ribbon, one end of described stationary ring Stamping Steel Ribbon extends to the rubbing surface that rotating ring contacts with stationary ring, and stationary ring Stamping Steel Ribbon contacts with the inner ring of stationary ring seal ring and seals.
4. the two screw pump of Split mechanical seal is housed as claimed in claim 2, it is characterized in that: the split surface that two rotating rings split part is provided with ring seal bar, one end of described ring seal bar extends to the rubbing surface that rotating ring contacts with stationary ring, and the other end contacts with seal ring of moving ring and seals.
5. the two screw pump of Split mechanical seal is housed as claimed in claim 2, it is characterized in that: the axial end place of sealing seat is provided with and is in the seal washer that two are installed channels peripheral, the split surface that two sealing seats split part is provided with the first Stamping Steel Ribbon and the second Stamping Steel Ribbon, described first Stamping Steel Ribbon contacts with seal washer and seals, and contacts with the outer ring of stationary ring seal ring and seal; Described second Stamping Steel Ribbon is in two and installs between passage, and this second Stamping Steel Ribbon is to contact with two stationary ring seal rings installed in passage and seals.
6. the two screw pump of Split mechanical seal is housed as claimed in claim 5, it is characterized in that: what passage installed by described first Stamping Steel Ribbon along place has extended radially inwardly branch, to be contacted seal by this branch with the outer ring of stationary ring seal ring.
7. the two screw pump two screw pump of Split mechanical seal is housed as claimed in claim 1, it is characterized in that: described first end cap is for splitting part, this splits the first groove that part split surface is provided with the first end cap Stamping Steel Ribbon and installs this first end cap Stamping Steel Ribbon, the axial end of the first end cap is provided with the first packing ring, described first end cap Stamping Steel Ribbon and the first washer contacts seal, and one end extends to the contact jaw that screw rod passes the first end cap.
8. the two screw pump of Split mechanical seal is housed as claimed in claim 1, it is characterized in that: described two screw rods are linked by synchromesh gear, described synchromesh gear is in the second end cap, this second end cap is for splitting part, this splits the second groove that part split surface is provided with the second end bracket enclosed bar and installs this second end bracket enclosed bar, the axial end of the second end cap is provided with the second packing ring, described second end bracket enclosed bar quantity is 1, and these the second end bracket enclosed bar two ends all seal with the second washer contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310333000.9A CN103388580B (en) | 2013-08-02 | 2013-08-02 | Split mechanical seal and the two screw pump of Split mechanical seal is housed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310333000.9A CN103388580B (en) | 2013-08-02 | 2013-08-02 | Split mechanical seal and the two screw pump of Split mechanical seal is housed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103388580A CN103388580A (en) | 2013-11-13 |
| CN103388580B true CN103388580B (en) | 2016-01-20 |
Family
ID=49532961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310333000.9A Active CN103388580B (en) | 2013-08-02 | 2013-08-02 | Split mechanical seal and the two screw pump of Split mechanical seal is housed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103388580B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564657A (en) * | 2015-01-09 | 2015-04-29 | 上海维尔泰克螺杆机械有限公司 | Twin-screw liquid pump |
| CN108180140B (en) * | 2017-12-20 | 2023-10-27 | 杭州电子科技大学 | Full-sealed double-screw pump |
| CN108266373B (en) * | 2017-12-20 | 2023-06-30 | 杭州电子科技大学 | Elastic composite spiral axial pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1437575A1 (en) * | 1987-03-17 | 1988-11-15 | И.М.Чесноков и А.И.Чеснаков | Double-screw mortar pump |
| CN101725712A (en) * | 2009-11-02 | 2010-06-09 | 浙江长城减速机有限公司 | Complete split type mechanical seal for kettle |
| CN201574926U (en) * | 2009-11-30 | 2010-09-08 | 天津泵业机械集团有限公司 | Economic three-screw pump |
| CN103062049A (en) * | 2013-01-10 | 2013-04-24 | 宁波得利时泵业有限公司 | Mechanical seal device of rotor pump |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9068571B2 (en) * | 2009-04-03 | 2015-06-30 | Ergoseal, Inc. | Seal for oil-free rotary displacement compressor |
-
2013
- 2013-08-02 CN CN201310333000.9A patent/CN103388580B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1437575A1 (en) * | 1987-03-17 | 1988-11-15 | И.М.Чесноков и А.И.Чеснаков | Double-screw mortar pump |
| CN101725712A (en) * | 2009-11-02 | 2010-06-09 | 浙江长城减速机有限公司 | Complete split type mechanical seal for kettle |
| CN201574926U (en) * | 2009-11-30 | 2010-09-08 | 天津泵业机械集团有限公司 | Economic three-screw pump |
| CN103062049A (en) * | 2013-01-10 | 2013-04-24 | 宁波得利时泵业有限公司 | Mechanical seal device of rotor pump |
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| Publication number | Publication date |
|---|---|
| CN103388580A (en) | 2013-11-13 |
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