CN104632614A - Sealing assembly, a conveyor with the sealing assembly, and a method for operating said sealing assembly - Google Patents
Sealing assembly, a conveyor with the sealing assembly, and a method for operating said sealing assembly Download PDFInfo
- Publication number
- CN104632614A CN104632614A CN201410558029.1A CN201410558029A CN104632614A CN 104632614 A CN104632614 A CN 104632614A CN 201410558029 A CN201410558029 A CN 201410558029A CN 104632614 A CN104632614 A CN 104632614A
- Authority
- CN
- China
- Prior art keywords
- sealing
- recess
- cavity
- sealing configuration
- medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
- F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
Abstract
The invention relates to a sealing assembly, a conveyor with the sealing assembly, and a method for operating said sealing assembly. The sealing assembly (1) for conveyors, particularly for gear pumps, in which an inner space (7) with respect to an outer space (6) is sealed is provided. The seal assembly (1) comprises at least two sealed parts (2, 3) each having a sealing surface (15, 16 ), and wherein a recess (9) is present in at least one of the sealing surfaces (15, 16), is characterized in that a sealing element (4) is present, which fills the recess (9) partially, so that a cavity (5) consist in the recess (9) remains in that the recess (9) is connected via a feed channel to a source of flushing medium, that the recess (9) is connected via a discharge channel (12) and that the cavity (5) is at least partially active with flushing medium.
Description
Technical field
The present invention relates to sealing configuration, there is the operating method of the feedway of sealing configuration especially gear pump and sealing configuration.
Background technique
Many manufacturing processs in polymer processing industries are to oxygen sensitive.Therefore oxygen will be avoided to contact polymer as far as possible.Generally, polymerization process is carried out in a vacuum.Thus be exactly there is following danger in the process, that is, by the negative pressure oxygen intake in equipment constituent elements.Especially, gear pump has the sealing position being easy to occur to leak.
Usually, gear pump is used in the below of polymer reactor as feedway.Task assigned by described gear pump final reaction product is drawn off from reactor and sends into the equipment constituent elements continuing conveying.
Propose as the valve jacket of the technique constituent elements (as gear pump) of important (possible unsealing) or cover body arrange the protection valve jacket added for avoiding oxygen to contact fed sheet of a media.To this, such as, live relevant equipment constituent elements with sheet metal clamshell, here, pure nitrogen gas is filled in the space between equipment constituent elements and protection valve jacket.But this has remarkable shortcoming with regard to price and with regard to equipment accessibility.
In addition, a kind of sealing configuration for gear pump is disclosed by international patent application publication WO2013/127464.This known instruction is effectively and achieves good sealing, but here, needs for two grooves of seal ring and the recess for filling sealing medium.This known sealing configuration cannot be retrofitted in existing equipment, is therefore only applicable to new equipment constituent elements.A kind of similar sealing configuration is be disclosed in the model utility of DE202004018733U1 at notification number, and here, sealing structure is with not too effective compared with the instruction of WO2013/127464.
Such as, in order to the sealing position between gear pump case and gear pump cover seals, and the metallic O ring that gas is filled is loaded described lid or housing.
Under normal conditions, they completely reliably seal to avoid polymer to flow out from the pump being in high interior pressure.But seal action is not all best for gas under all operating modes.
Summary of the invention
Therefore, the present invention is based on following task, namely provide a kind of sealing configuration, it can simply and realize at low cost, and can be retrofitted in existing gear pump.
Feature given by characteristic by first aspect has been come by this task.The operation method of other Advantageous embodiments of the present invention, feedway especially gear pump and sealing configuration provides in other side.
First the present invention relates to a kind of sealing configuration for feedway especially gear pump, and wherein an inner chamber can be sealed relative to an exocoel.Described sealing configuration comprises at least two parts to be sealed, and these at least two parts to be sealed respectively have a sealing surface, and one of them described sealing surface is provided with recess.The feature of sealing configuration of the present invention is, be provided with a Sealing, it partly fills described recess, thus a cavity is left in this recess, this recess is rushed the supply source sweeping medium by service duct and is connected with having, and this recess is communicated with by discharge route and this cavity has and sweeps medium with punching at least in part and initiatively washed down.
An embodiment variant of sealing configuration of the present invention is, described Sealing is O shape circle or spiral seal.
Other embodiment variant of sealing configuration of the present invention is, described service duct and the discharge route form at least partly with groove in sealing face is formed.
Described service duct and/or discharge route also can reequip Sealing by plain mode in existing recess, and way is that this service duct and discharge route are offered in one or two sealing surfaces, and to this, such as Flex is especially suitable for.
Other embodiment variant of sealing configuration of the present invention is, this service duct and/or discharge route extend past at least one parts to be sealed at least partly to the outside connection part not in sealing surface.
There is provided a kind of stable connection part whereby, it still can remain when sealing configuration is dismantled.
The other embodiment variant of sealing configuration of the present invention is, this discharge route is connected with throttle valve at outer end place.
In this embodiment variant, this cavity punching sweeps medium to purge, and punching is swept medium and is disposed in surrounding environment simply by throttle valve subsequently.
The other embodiment variant of sealing configuration of the present invention is, at least one cavity in described supply source, service duct, recess or recess and discharge route form closed rushing and sweep medium circulation.
Parts described in one of them are housings of feedway, and another parts are the lids on the housing of described feedway.
Some other embodiment variant of sealing configuration of the present invention is, be provided with for measure flow through recess rush the flowmeter sweeping rate-of flow.
The measurement that rate-of flow is swept in punching provides following possibility, namely checks the reliability of sealing configuration.Thus, can find that the too much punching brought by corrosion damage is swept dielectric loss and can arrange maintenance in time by measuring.
Other embodiment variant of sealing configuration of the present invention is, it is inert gas especially nitrogen or inert fluid especially silicone oil that medium is swept in this punching.
The other embodiment variant of sealing configuration of the present invention is, the seal is fixed in recess by fixed block.
Ensure that this cavity is swept medium by punching completely and flow through whereby.
The other embodiment variant of sealing configuration of the present invention is, is provided with fluidised form sealing medium between described sealing surface, here, such as can adopt as sealing medium
high-Temp Red RTV organosilicon packing ring (Permatex, Connecticut, USA 06106, Hart Ford, 10 Columbus mansion-www.permatex.com).
In addition, target of the present invention is a kind of for carrying the feedway especially gear pump of fed sheet of a media in the lumen, this inner chamber and exocoel seal substantially in a gastight manner, and wherein this feedway comprises at least one sealing configuration according to one of them aforementioned variant mode of execution.
Finally, the present invention for be a kind of operation method of the sealing configuration according to aforesaid embodiment variant, wherein, be provided with a Sealing, the seal partly fills recess, thus leaves cavity in this recess, and wherein this cavity punching sweeps medium to wash down.
An embodiment variant of method of the present invention is, flows through rushing of this cavity and sweeps rate-of flow or rushing in cavity and sweep pressure medium and be kept constant.
Other embodiment variant of the inventive method is, what flow through this cavity rushes that to sweep rate-of flow measured.
Want it is clear that, embodiment variant described above can combine by any way.Only get rid of and cause those conflicting embodiment variant when combining.
Accompanying drawing explanation
The present invention is further described below with reference to embodiment shown in the drawings, wherein:
Fig. 1 is the plan view of the housing of the gear pump not having lid and gear and corresponding axle,
Fig. 2 shows the sectional view of the first embodiment variant of sealing configuration of the present invention,
Fig. 3 shows the sectional view of the second embodiment variant of sealing configuration of the present invention,
Fig. 4 shows the sectional view of the connection part arranged with sealing surface compartment of terrain.
Embodiment
The plan view of the housing 2 of gear pump has been shown in Fig. 1, here, the parallel axle that pitch wheel is housed thereon of direction of observation.The not shown described axle of Fig. 1 and gear.Because there is no the lid of canned pump housing, therefore freely can see having in the inner chamber 7 of spectacle cross section.The recess 9 as a part for sealing configuration 1 can be seen around spectacle profile.Recess 9 extends around spectacle profile completely and is connected with discharge route 12 with service duct 11, and these two passages stretch out through housing 2.Can see multiple hole 10 in addition, they are set to for cap (not shown in figure 1) is fixed on pump case 2.Cap is removed to install or remove described gear pump.In gear pump normally operation work, inner chamber 7 must be sealing relative to exocoel 8 as far as possible.For this reason, sealing configuration is set between cap and housing.
In the recess 9 belonging to sealing configuration, put into a Sealing, also will describe described Sealing in detail in conjunction with the following drawings.
As shown in Figure 1, recess 9 is machined in housing 2.Or recess 9 also can be machined in cap.Finally can expect that recess 9 is not only arranged in housing 2, also be arranged in cap.
Fig. 2 shows the sectional view of the cutting line A-A painted along Fig. 1 of sealing configuration 1.Sealing configuration 1 is made up of first component 2 (cap as gear pump) and second component 3 (as gear pump case).In second component 3, be provided with the recess 9 for partly holding Sealing 4, but described Sealing does not fill up recess 9 completely, is thus left behind cavity 5 when first component 2 is forced on second component 3.In addition, when two parts 2,3 pressing, the seal 4 must protrude from sealing surface 16 to obtain excellent sealing.By its sealing surface 15,16 in other words of the first and second parts 2,3 described in pressing, the Sealing 4 be made up of elastic material is compressed, and for this reason, sealing configuration 1 has sealed this two parts 2,3.But the same as before, impurity can arrive Sealing 4 by the sealing off gap be made up of sealing surface 15,16.Therefore, according to the difference of impurity, it may cause corrosion in recess 9 region, under worst case, this corrosion causes the infiltration of Sealing 4, and sealing structure may be packing less for this reason.Therefore according to the present invention, provide cavity 5 in recess 9, send into punching sweep medium in cavity by service duct 11 (Fig. 1), punching is swept medium and is scattered in cavity 5.Punching is swept medium and is sent by discharge route 12, thus ensure that medium continuous updating in cavity 5 is swept in punching.
Such as inert gas especially nitrogen or inert fluid especially silicone oil be suitable for sweep medium do punching.
Fig. 3 shows the sectional view according to Fig. 2 of another embodiment variant of the present invention.Be different from the embodiment variant according to Fig. 2, according in the embodiment variant of Fig. 3, in recess 9, be provided with fixed block 8, which ensure Sealing 4 and be secured in place.Ensure that cavity 5 has desired cross section and punching is swept medium and can successfully be flow through recess 9 whereby.
Want it is clear that, this fixed block 8 can be arranged on the arbitrary position in recess 9.Also can expect being provided with multiple fixed block 8, thus Sealing 4 such as can be centered remain in recess 9, occur cavity 5 in Sealing 4 both sides for this reason.
Fig. 4 is to show the details C of the discharge route 12 in connection part region perpendicular to the sectional view of sealing surface 15 as shown in Figure 1.As shown in Figure 1, discharge route 12 is processed to form in sealing surface 15.But in shown embodiment variant, the discharge route 12 in sealing surface 15 does not extend to the outer surface of housing 2.Discharge route 12 extends to connection part 14 by the hole 13 in housing 2.This has the following advantages, and sealing surface 15,16 does not extend past connection part 14, provides the connection possibility of the simplification for valve, connecting pipeline etc. whereby.Sweep medium supply source (Fig. 1) to connect this punching in service duct 11 side and be provided with as in the diagram for a corresponding connection part shown in discharge route 12.
Another embodiment variant of the present invention is, service duct 11 and discharge route 12 are different from modification as shown in figs. 1 and 4, is not be opened in housing 2, but is opened in cap.Now can expecting being provided with one passes straight through to recess 9 or cavity 5 hole through cap, sweeping medium for giving recess or cavity supply punching.
Another embodiment variant is, the sealing off gap between sealing surface 15,16 is formed with fluid-tight relation, and way is that fluidised form sealing medium is introduced into sealing gap.Also all connection parts etc. are applicable under similar circumstances.Now, such as, with trade name
the sealing medium that High-Temp Red RTV organosilicon packing ring (Permatex, Connecticut, USA 06106, Hart Ford, 10 Columbus mansion-www.permatex.com) obtains is suitable as sealing medium.
Claims (15)
1. the sealing configuration for feedway especially gear pump (1), wherein inner chamber (7) can be sealed relative to exocoel (6), wherein sealing structure (1) comprises at least two parts (2 to be sealed, 3), these two parts to be sealed respectively have a sealing surface (15, 16), and at one of them described sealing surface (15, 16) recess (9) is provided with in, it is characterized in that, be provided with Sealing (4), the seal partly fills described recess (9), thus keep leaving cavity (5) in described recess (9), this recess (9) is rushed the supply source sweeping medium by service duct (11) and is connected with having, this recess (9) is communicated with by discharge route (12), and described cavity (5) can utilize punching to sweep medium at least in part and initiatively be washed down.
2. sealing configuration according to claim 1 (1), is characterized in that, described Sealing (4) is O shape circle or spiral seals.
3. sealing configuration according to claim 1 and 2 (1), it is characterized in that, described service duct (11) and described discharge route (12) are formed with the form of groove at least in part in described sealing surface (15,16).
4. sealing configuration according to any one of claim 1 to 3 (1), it is characterized in that, described service duct (11) and/or described discharge route (12) pass through at least one parts to be sealed (2 at least partly, 3) the outside connection part (14) not in described sealing surface (15,16) is extended to.
5. sealing configuration according to any one of claim 1 to 4 (1), is characterized in that, described discharge route (12) is connected with throttle valve at outer end place.
6. sealing configuration according to any one of claim 1 to 4 (1), it is characterized in that, at least one cavity (5) in described supply source, described service duct (11), described recess (9) or described recess (9) and described discharge route (12) form closed rushing and sweep medium circulation.
7. sealing configuration according to any one of claim 1 to 6 (1), is characterized in that, one of them parts (2) are the housings of described feedway, and second component (3) is the lid on the described housing of described feedway.
8. sealing configuration according to any one of claim 1 to 7 (1), is characterized in that, be provided with for measure flow through described recess (9) rush the flowmeter sweeping rate-of flow.
9. sealing configuration according to any one of claim 1 to 8 (1), is characterized in that, it is inert gas especially nitrogen or inert fluid especially silicone oil that medium is swept in described punching.
10. sealing configuration according to any one of claim 1 to 9 (1), is characterized in that, described Sealing (4) is fixed in described recess (9) by fixed block (8).
11. sealing configurations according to any one of claim 1 to 10 (1), is characterized in that, between described sealing surface (15,16), be provided with fluidised form sealing medium.
12. 1 kinds of feedways and especially gear pump, for conveying fed sheet of a media in inner chamber (7), this inner chamber and exocoel (8) seal substantially in a gastight manner, and wherein said feedway has at least one sealing configuration (1) according to any one of claim 1 to 11.
13. 1 kinds for operating the method for the sealing configuration (1) according to any one of claim 1 to 11, wherein be provided with Sealing (4), the seal partly fills recess (9), thus holder has cavity (5) in described recess (9), it is characterized in that, sweep medium with punching and wash down described cavity (5).
14. methods according to claim 13, is characterized in that, flow through rushing of described cavity (5) and sweep rate-of flow or rushing in described cavity (5) and sweep pressure medium and be kept constant.
15. methods according to claim 13 or 14, is characterized in that, what flow through described cavity (5) rushes that to sweep rate-of flow measured.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13191707.2 | 2013-11-06 | ||
| EP13191707.2A EP2871363B1 (en) | 2013-11-06 | 2013-11-06 | Gear pump with a sealing assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104632614A true CN104632614A (en) | 2015-05-20 |
| CN104632614B CN104632614B (en) | 2018-09-14 |
Family
ID=49546301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410558029.1A Active CN104632614B (en) | 2013-11-06 | 2014-10-20 | The operating method of sealing structure, the conveying device with sealing structure and sealing structure |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2871363B1 (en) |
| CN (1) | CN104632614B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3116283A1 (en) * | 1981-04-24 | 1982-11-11 | Lederle GmbH Pumpen- und Maschinenfabrik, 7803 Gundelfingen | Rotary piston pump with a face seal |
| US20050123414A1 (en) * | 2003-12-03 | 2005-06-09 | Matthew Key | Pumping apparatus |
| CN101395375A (en) * | 2006-04-04 | 2009-03-25 | Hydac系统有限公司 | Means for delivery of flowable media, especially lubricants |
| CN202091196U (en) * | 2011-05-24 | 2011-12-28 | 博顿液压股份有限公司 | Sealing element for gear pump or motor |
| WO2013127464A1 (en) * | 2012-03-02 | 2013-09-06 | Maag Pump Systems Ag | Sealing arrangement, a conveying device having a sealing arrangement and a method for operating the sealing arrangement |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2700381A1 (en) * | 1977-01-07 | 1978-07-13 | Bosch Gmbh Robert | DISPLACEMENT MACHINE |
| US4993720A (en) * | 1988-08-15 | 1991-02-19 | Ciotola Alfredo A | Self-sealing mechanical seal gland for pumps and other machinery |
-
2013
- 2013-11-06 EP EP13191707.2A patent/EP2871363B1/en active Active
-
2014
- 2014-10-20 CN CN201410558029.1A patent/CN104632614B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3116283A1 (en) * | 1981-04-24 | 1982-11-11 | Lederle GmbH Pumpen- und Maschinenfabrik, 7803 Gundelfingen | Rotary piston pump with a face seal |
| US20050123414A1 (en) * | 2003-12-03 | 2005-06-09 | Matthew Key | Pumping apparatus |
| CN101395375A (en) * | 2006-04-04 | 2009-03-25 | Hydac系统有限公司 | Means for delivery of flowable media, especially lubricants |
| CN202091196U (en) * | 2011-05-24 | 2011-12-28 | 博顿液压股份有限公司 | Sealing element for gear pump or motor |
| WO2013127464A1 (en) * | 2012-03-02 | 2013-09-06 | Maag Pump Systems Ag | Sealing arrangement, a conveying device having a sealing arrangement and a method for operating the sealing arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104632614B (en) | 2018-09-14 |
| EP2871363B1 (en) | 2020-10-07 |
| EP2871363A1 (en) | 2015-05-13 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180809 Address after: Upper granite, Switzerland Applicant after: MAAG PUMP SYSTEMS AG Address before: Upper granite, Switzerland Applicant before: All Fubaishiji pump group (Europe) Co. Ltd. |
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| GR01 | Patent grant |