CN102959245B - Gear pump - Google Patents
Gear pump Download PDFInfo
- Publication number
- CN102959245B CN102959245B CN201180031637.1A CN201180031637A CN102959245B CN 102959245 B CN102959245 B CN 102959245B CN 201180031637 A CN201180031637 A CN 201180031637A CN 102959245 B CN102959245 B CN 102959245B
- Authority
- CN
- China
- Prior art keywords
- pump
- gear
- ring
- input channel
- pump case
- 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.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000012856 packing Methods 0.000 claims description 15
- 238000002955 isolation Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 238000011010 flushing procedure Methods 0.000 abstract description 24
- 239000000463 material Substances 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 description 9
- 230000008021 deposition Effects 0.000 description 5
- 208000034189 Sclerosis Diseases 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 238000000638 solvent extraction Methods 0.000 description 3
- 235000012489 doughnuts Nutrition 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
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
- F04C15/0038—Shaft sealings specially adapted for rotary-piston machines or pumps
-
- 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
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
- F04C13/001—Pumps for particular liquids
-
- 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
- F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
- F04C13/005—Removing contaminants, deposits or scale from the pump; Cleaning
-
- 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
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/086—Carter
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention relates to a gear pump comprising a plurality of toothed wheels which mesh with one another for conveying a conveying medium, are held rotatably in a pump housing and convey the conveying medium from a suction region into a pressure region of the pump housing, one of the toothed wheels being driven by a pump shaft which has an engaging end projecting out of the pump housing. In order to seal the pump housing, a shaft seal ring is fixed on the circumference of the pump shaft. In order to avoid material deposits, according to the invention, an inner flushing chamber is provided for the shaft sealing ring on the circumference of the pump shaft, which flushing chamber is connected to the pressure region of the pump housing via an inlet channel in the pump housing.
Description
Technical field
The present invention relates to a kind of gear pump.
Background technique
In order to carry and measure fluid, known use has the gear pump of multiple gear be engaged with each other, and described gear carries fluid between suction district and pressure area.For this reason, drive at least one gear by pump shaft, described pump shaft is connected with the drive unit be arranged on outside pump case.This pump shaft to be bearing in pump case and by Simmer ring relative to environmental sealing.Simmer ring prevents the fluid be transferred from flowing out at this, and described fluid passes the bearing position of pump shaft by leakage flow and deposits in the front region of means for two very close shafts seal ring.
In order to regularly replace this leakage flow, such as EP0669465A1 discloses a kind of gear pump, and wherein, the leakage flow flowing through pump shaft bearing position enters in doughnut, and this doughnut is connected with the suction side of pump by return flow line.But the shortcoming of this return-flow system is mainly, there is larger pressure reduction in the bearing position of pump shaft, therefore make leakage flow increase.In addition, can not get rid of and form deposition of material on Simmer ring, deposition of material cannot be changed there and cause sclerosis according to fed sheet of a media, and this sclerosis makes the sealing lip advanced wear of Simmer ring.
WO2007/131994A1 discloses another kind of gear pump, and wherein, return-flow system is assisted by pump shaft loopback screw thread circumferentially.At this, the leakage flow flowing through pump shaft bearing position directly enters loopback section, and this loopback section is configured between Simmer ring and bearing position on pump shaft.Loopback section is connected with the suction side of pump by loopback channel.Therefore in loopback section, produce reverse loopback stream, this loopback stream sends the fed sheet of a media flowing through bearing position back to.But this system requirements constructs loopback screw thread in pump shaft circumference, this causes manufacture cost to increase.
Summary of the invention
Therefore task of the present invention is, improves similar gear pump like this, to avoid at run duration fed sheet of a media deposition of material possible in Simmer ring region.
According to the present invention, this task solved by following manner: gear pump comprises and is multiplely engaged with each other to carry fed sheet of a media, rotatably be maintained at pump shaft that is in pump case and that fed sheet of a media is transported to the gear pressure area from the suction district of pump case and comprises for driving one of described gear, described pump shaft has the engagement end portion of stretching out pump case, and at the Simmer ring being circumferentially fixed for canned pump housing of pump shaft, for Simmer ring is at the developing room circumferentially configuring inner side of pump shaft, this developing room is connected with the pressure area in pump case by input channel.
Special benefits of the present invention is: can input continuous print flushing flow to Simmer ring, this flushing flow is made up of fed sheet of a media.Therefore can avoid stopping in the dead band of fluid before Simmer ring.Therefore be beneficial to the such fluid of conveying especially according to gear pump of the present invention, its stop in pump dead band can cause forming solid or sclerosis, such as, be exactly this situation when tackiness agent.
A kind of favourable expansion scheme of the present invention---developing room is connected with suction district by the return flow line in pump case---guarantees that the flushing flow in developing room is changed continuously, within it go up by continuous flushing thus by Simmer ring.The pressure reduction produced by input channel and return flow line guarantees the continual continuous print flushing flow from the pressure area of pump to suction district.
In order to realize volume flowrate little as far as possible, preferred use a kind of expansion scheme of the present invention, wherein, input channel and/or return flow line pass in a region of the thrust surface of shell plates respectively, this thrust surface and the end face acting in conjunction remaining on the gear on pump shaft.Therefore the leakage flow picking out and occur between gear and shell plates can be divided in pressure area, to produce flushing flow.In addition, Pressure Drop is guaranteed in the thrust gap between gear and shell plates, also can realize the lower flushing flow of stress level under larger operating pressure thus.
In order to rinse the whole annular space of the developing room before Simmer ring equably, input channel and return flow line offset angular 180 ° of ground pass into developing room.
By making input channel and/or return flow line, there is restriction respectively and also can advantageously affect the pressure reduction existed for the formation of flushing flow.Therefore advantageously can produce little volume flowrate, it is particularly suitable for rinsing little developing room.The loss caused by flushing flow during conveying can be reduced to minimum value thus.
Particularly advantageously a kind of expansion scheme of the present invention, wherein, restriction is made up of the throttle orifice in packing ring, and this throttle orifice configures the port to the port of input channel and/or return flow line in developing room.Therefore can realize the free space towards Simmer ring minimum in developing room, rinse this free space by corresponding few flushing flow.
At this advantageously, packing ring has two opposite throttle orifices, and described throttle orifice directly configures to input channel and return flow line.Use the special benefits of packing ring to be, can provide personalized structure and size be formed in developing room for rinsing the free space inside Simmer ring.
In a kind of expansion scheme be proved to be as being convenient to installation especially of the present invention, Simmer ring is fixed by seal casinghousing, and sealing housing is fixedly connected with pump case and pump shaft passes sealing housing.
Arrange with being concentric with pump shaft to make Simmer ring relative to bearing hole, seal casinghousing have form developing room to flange, this to embed in the centering breach of pump case flange and is preferred for fixing packing ring, and therefore the port front of the packing ring port and return flow line that can be close to input channel is maintained in the bottom of centering breach.
Traditional Simmer ring for canned pump housing can be used in gear pump according to the present invention.But Simmer ring also can be made up of sealed packet or multiple sealing system.Therefore in a kind of favourable expansion scheme of the present invention, arrange the second Simmer ring in seal casinghousing, and be circumferentially configured with isolation ward at pump shaft between two Simmer rings, this isolation ward is filled with spacer medium.Therefore inner shafts seal ring and environment completely isolated, thus the fed sheet of a media of high response also can reliably be carried.
Accompanying drawing explanation
Below with reference to the accompanying drawings describe in detail according to gear pump of the present invention by several embodiment.Accompanying drawing is as follows:
Fig. 1 is the schematic cross section of the first embodiment of gear pump of the present invention;
Fig. 2 is the schematic cross sectional view of the gear pump of embodiment according to Fig. 1;
Fig. 3 is the schematic cross sectional view of the another kind of embodiment of gear pump of the present invention;
Fig. 4 is the schematic partial cross-sectional view of the another kind of embodiment of gear pump of the present invention.
Embodiment
The first embodiment according to gear pump of the present invention is shown in fig 1 and 2.At this, Fig. 1 schematically shows the cross-sectional view of gear pump and Fig. 2 illustrates that gear pump is at the sectional drawing staggered in the cross section of 90 ° with this cross-sectional view.
Gear pump comprises pump case 1.This pump case 1 multi-piece construction and have multiple shell plates 1.1,1.2 and 1.3, described shell plates is connected to each other by multiple bolt 23.Middle casing plate 1.3 has a gap part for two gears be engaged with each other 3 and 4.Middle casing plate 1.3 is maintained between the shell plates 1.1 and 1.2 of outside together with gear 3 and 4.One of gear 3 can be rotatably set on rest pin 6.This rest pin 6 is maintained in the pin-and-hole 7.1 of outside shell plates 1.2 for this reason and is configured in the pin-and-hole 7.2 of blind hole with in opposite outside shell plates 1.1.Second gear 4 rotationally fixedly is arranged on pump shaft 5.This pump shaft 5 can be rotated to support in shell plates 1.1 and 1.2 with multiple axle section.For this reason, shell plates 1.1 has the first bearing hole 8.1 and the second shell plates 1.2 has the second bearing hole 8.2, and described bearing hole passes completely through shell plates 1.1 and 1.2 respectively.Pump shaft 5 passes shell plates 1.1 and stretches out outside pump case 1 with an engagement end portion 5.1.Engagement end portion 5.1 can be connected with at this unshowned drive unit.
The opposite side that pump case 1 is opposite is configured with a pump intake 2 and one in pump case 1 at this unshowned pump discharge.Pump intake 2 and passing in the pressure area opposite with, a suction district in pump case 1 through outside shell plates 1.2 at this at this unshowned pump discharge.In order to connect pump, outside side body plate 1.2 is configured with junction surface 9, pump intake 2 and pump discharge pass in this junction surface.
In order to relative to engagement end portion 5.1 canned pump housing 1, be circumferentially provided with Simmer ring 12 at pump shaft 5.This Simmer ring 12 is maintained between shell plates 1.1 and pump shaft 5 for this reason.
The inner side of Simmer ring 12 is concentric with bearing hole 8.1 ground in shell plates 1.1, constructs a developing room 11 around pump shaft 5.
As shown in Figure 2, for developing room configures an input channel 13.This input channel 13 to pass in developing room 11 with an end and with opposite the other end pass into shell plates 1.1 in the thrust surface 15 of gear 4.Input channel 13 passes in a region be connected with the pressure area of pump case 1 of thrust surface 15 at this.Therefore, input channel 13 forms the connection between pressure area and developing room 11.
On the opposite opposite side of pump shaft 5, offset angular 180 ° of ground arrange a return flow line 14 in shell plates 1.1, and this return flow line to pass in developing room 11 with an end and ends in the thrust surface 15 of gear 4 with opposite the other end.Return flow line 14 is passed in one of thrust surface 15 region be connected with suction district by gap.Therefore in developing room 11, produce pressure reduction, this pressure reduction allows inflow and the outflow of flushing flow.
In the embodiment shown in Fig. 1 and 2, the axial force acted on pump shaft 5 ring 10 that is locked absorbs, and this locking ring is arranged between pump shaft 5 and shell plates 1.2.
Be in operation, fed sheet of a media is inhaled into by pump intake 2 and is transferred to pressure area from suction district by gear 3 and 4 in pump case 1.Through pressure area, fed sheet of a media is discharged by pump discharge.In this case, occur leakage flow in the gap between pump case 1 and gear 3 and 4, this leakage flow flows to the lower side of pressure based on the side that pressure is higher from pump case 1 regularly of the pressure reduction between pressure area and suction district.Therefore the bearing position of pump shaft 5 in bearing hole 8.1 and 8.2 is also lubricated by the leakage flow of fed sheet of a media.Shell plates 1.2 is sealed by the flange adjacent with junction surface 9.On another opposite housing side, the sealing of pump case 1 is undertaken by Simmer ring 12.In order to prevent the possible deposition of material of the fed sheet of a media leakage flow occurred on the inner side of Simmer ring 12 through bearing hole 8.1, in developing room 11, form the fed sheet of a media flushing flow of continuous-flow.The flushing flow that be formed by the leakage flow in gap should to be entered in developing room 11 by input channel 13 and return to the lower side of pump case 1 pressure by return flow line 14.Prevent fed sheet of a media stay longer and avoid the decomposition of fed sheet of a media or aging thus in the region of Simmer ring 12 thus.Simmer ring 12 is subject to the flushing of fresh fed sheet of a media continuously.
Therefore, gear pump according to the present invention is particularly suitable for carrying such fed sheet of a media, and it just the chemical reaction especially causing material hardening occurs in the shorter waiting time.Known, the deposition of material of sclerosis can cause wearing and tearing to increase in the region of Simmer ring.By advantageously this point can be avoided at inner side continuous flushing Simmer ring.
Fig. 3 schematically illustrates the another kind of embodiment according to gear pump of the present invention with sectional drawing.This embodiment is substantially identical with the embodiment according to Fig. 1 and 2, only difference is described at this.
In the embodiment shown in fig. 3, seal casinghousing 18 is set in order to hold Simmer ring 12.Described seal casinghousing 18 is fixedly connected with pump case 1.At this, outside shell plates 1.1 has centering breach 19, embedding in this centering breach flange 20 of seal casinghousing 18.Seal casinghousing 18 has the shoulder hole 24 for holding Simmer ring 12, and this shoulder hole passes flange 20.
Between shell plates 1.1 and seal casinghousing 18, arrange packing ring 16, this packing ring is fixed on centering breach 19 by retaining ring bank 16.1 and between flange 20.Packing ring 16 has two 180 ° of throttle orifices constructed 17.1 and 17.2 that offset one from another, and described throttle orifice passes in input channel 13 and return flow line 14 on the side towards centering breach 19.The opposite other end of packing ring 16 forms developing room 11 between Simmer ring 12 and packing ring 16 in seal casinghousing 18.Throttle orifice 17.1 and 17.2 passes in developing room 11, and the flushing flow inputted by input channel 13 is thus imported in developing room 11 by throttling.In this embodiment, developing room 11 is configured with minimum free space, and therefore minimum flushing flow volume flowrate has been enough to rinse the region on inside Simmer ring 12.
In flushing flow is returned by return flow line 14, arrange throttle orifice 17.2, so that the flushing flow in intensive distribution developing room, the whole circumferential area of Simmer ring 12 is all rinsed thus.The throttle orifice 17.1 and 17.2 180 ° of ground that offset one from another in packing ring 16 are configured on packing ring 16.As requested, throttle orifice 17.1 and 17.2 can have the hole cross section of formed objects or different hole cross sections.
The special benefits of the embodiment according to gear pump of the present invention therefore shown in Fig. 3 is that Simmer ring 12 is rinsed in the flushing flow of formation small volume and therefore minimum leakage strongly.Also little volume flowrate can be realized under high operating pressure to input channel 13 restriction based on configuration.
Fig. 4 illustrates the another kind of embodiment of pump in accordance with the present invention with pump shaft part section.This embodiment is substantially identical with the embodiment according to Fig. 3, therefore only difference is described see above-mentioned explanation at this.With compared with the embodiment of Fig. 3, pump case 1 is expanded like this relative to being sealed on pump shaft 5 of environment, makes in seal casinghousing 18, be fixed with the second Simmer ring 22.Simmer ring 12 and 22 be fixed on spaced apart relation to each other through seal casinghousing 18 pump shaft 5 circumferentially.Circumferentially isolation ward 21 is formed by seal casinghousing 18 at pump shaft 5 between two Simmer rings 12 and 22.In isolation ward 21, be provided with fluid partitioning 25, this fluid partitioning makes inner shafts seal ring 12 isolate relative to environment.Therefore achieve better sealing, it is particularly favourable when the fed sheet of a media of high response.
Will explicitly point out at this, the structural design of the embodiment of the pump in accordance with the present invention that Fig. 1 to 4 shows is exemplary.Housing is non-essential is configured to plank frame mode.But importantly, in pump shaft, continue through flushing flow rinse inside Simmer ring, this flushing flow is directly supplied by fed sheet of a media.On this point, can arrange and construct input channel and return flow line like this, they are directly passed in the pressure chamber of pressure area or the suction chamber of suction district.Also can advantageously integrated multiple input channel or multiple return flow line in pump case.
Reference numerals list
1 pump case 12 Simmer ring
Shell plates 13 input channel outside 1.1
Shell plates 14 return flow line outside 1.2
1.3 middle casing plate 15 thrust surfaces
2 pump intake 16 filling members
3 gears (servo-actuated) 16.1 retaining ring bank
4 gears (by driving) 17.1,17.2 throttle orifice
5 pump shaft 18 seal casinghousings
5.1 engagement end portion 19 centering breach
6 rest pin 20 pairs flange
7.1,7.2 pin-and-hole 21 isolation wards
8.1,8.2 bearing hole 22 second Simmer rings
9 junction surface 23 bolts
10 locking ring 24 shoulder holes
11 developing room 25 fluid partitionings
Claims (8)
1. gear pump, this gear pump comprises and is multiplely engaged with each other to carry fed sheet of a media, rotatably be maintained at gear (3 that is in pump case (1) and that be transported to from the suction district of pump case (1) by fed sheet of a media pressure area, 4) and the pump shaft (5) comprised for driving one of described gear (4), described pump shaft (5) has the engagement end portion (5.1) of stretching out pump case (1), and at the Simmer ring (12) being circumferentially fixed for canned pump housing (1) of pump shaft (5), it is characterized in that, for Simmer ring (12) is at the developing room (11) circumferentially configuring inner side of pump shaft (5), described developing room is connected with the pressure area of pump case (1) by the input channel (13) in pump case (1), wherein, described developing room (11) is connected with the suction district of pump case (1) by the return flow line (14) in pump case (1), described input channel (13) and/or return flow line (14) pass in a region of the thrust surface (15) of the shell plates (1.1) of pump case (1) respectively, this region of this thrust surface (15) is opposed with a face of the gear (4) remained on pump shaft (5).
2. gear pump according to claim 1, is characterized in that, described input channel (13) and return flow line (14) offset angular 180 ° of ground pass in developing room (11).
3. gear pump according to claim 1, is characterized in that, described input channel (13) and/or return flow line (14) have restriction respectively.
4. gear pump according to claim 3, it is characterized in that, described restriction is made up of the throttle orifice (17.1,17.2) in packing ring (16), and this throttle orifice configures the port to the port of input channel (13) and/or return flow line (14) in developing room (11).
5. gear pump according to claim 4, is characterized in that, described packing ring (16) have two opposite, configure throttle orifice (17.1,17.2) to input channel (13) and return flow line (14).
6. gear pump according to claim 1, is characterized in that, described Simmer ring (12) is fixed by seal casinghousing (18), and sealing housing is fixedly connected with pump case (1) and is passed by pump shaft (5).
7. gear pump according to claim 6, it is characterized in that, described seal casinghousing (18) have formation developing room (11) to flange (20), this flange is embedded in the centering breach (19) of pump case (1) and by packing ring (16) via around retaining ring bank (16.1) fix.
8. according to the gear pump of claim 6 or 7, it is characterized in that, have another Simmer ring (22) at seal casinghousing (18) internal fixtion and be circumferentially provided with isolation ward (21) at pump shaft (5) between described Simmer ring (12) and another Simmer ring described (22), this isolation ward is filled with spacer medium.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010025865.2 | 2010-07-02 | ||
| DE102010025865 | 2010-07-02 | ||
| PCT/EP2011/060133 WO2012000812A2 (en) | 2010-07-02 | 2011-06-17 | Gear pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102959245A CN102959245A (en) | 2013-03-06 |
| CN102959245B true CN102959245B (en) | 2016-01-06 |
Family
ID=44627361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180031637.1A Active CN102959245B (en) | 2010-07-02 | 2011-06-17 | Gear pump |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20130094988A1 (en) |
| EP (1) | EP2588756B1 (en) |
| CN (1) | CN102959245B (en) |
| WO (1) | WO2012000812A2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012006025B3 (en) * | 2012-03-27 | 2013-08-01 | Netzsch Pumpen & Systeme Gmbh | Pin joint for eccentric screw pump |
| DE102014111721A1 (en) | 2014-08-18 | 2016-02-18 | Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg | Fluidbeaufschlagungsvorrichtung for a transmission for a motor vehicle |
| DE202016106107U1 (en) | 2016-10-31 | 2018-02-01 | Hugo Vogelsang Maschinenbau Gmbh | Rotary lobe pump with sealing chamber seal |
| FR3060669B1 (en) * | 2016-12-20 | 2020-11-27 | Coutier Moulage Gen Ind | PLATE GEAR PUMP AND HYDRAULIC CENTERING PINS. |
| CN110249089B (en) * | 2017-01-12 | 2022-03-15 | 欧瑞康纺织有限及两合公司 | Device for wetting a plurality of threads and metering pump for such a device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1528956A1 (en) * | 1964-09-19 | 1970-07-02 | Bosch Gmbh Robert | Pump, especially heating oil pump |
| DE19710419A1 (en) * | 1996-03-14 | 1997-11-06 | Zexel Corp | Vane type compressor for e.g. air conditioner used in motor vehicle |
| EP1164293A2 (en) * | 2000-06-14 | 2001-12-19 | Barmag AG | Gear pump with a flushing system |
| CN1355380A (en) * | 2000-11-23 | 2002-06-26 | 罗伯特·博施有限公司 | Gear conveying pump, special conveying fuel to high pressure fuel actuator |
| CN2763580Y (en) * | 2005-01-04 | 2006-03-08 | 王建干 | End face sealed integral lubricant pump |
| DE102005000686A1 (en) * | 2005-01-04 | 2006-07-13 | Zf Lenksysteme Gmbh | Rotary pump for low-viscosity fluid has channel wall forming a throttle to reduce back flow of lubricant |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2998783A (en) * | 1958-04-25 | 1961-09-05 | John C Lee | Pressure-balanced gear pump |
| US3743369A (en) * | 1971-09-08 | 1973-07-03 | Skf Ind Trading & Dev | Cage for a rolling bearing |
| FI93764C (en) * | 1993-07-13 | 1995-05-26 | Finn Rotor Oy | rotator |
| DE19513822C2 (en) * | 1995-04-12 | 1999-10-28 | Volkswagen Ag | Device for delivering fuel from a storage tank to an internal combustion engine of a motor vehicle |
| ATE161075T1 (en) * | 1995-05-24 | 1997-12-15 | Maag Pump Systems Ag | BEARING ARRANGEMENT FOR A PUMP SHAFT OF A PUMP FOR DELIVERING MEDIA WITH DIFFERENT VISCOSITIES |
| US6524007B1 (en) * | 1999-03-15 | 2003-02-25 | William L. Hinks | Shaft bearing-seal assembly penetrating the wall of a pressure vessel |
| US6834998B2 (en) * | 2000-03-09 | 2004-12-28 | William Lloyd Hinks | Shaft bearing-seal assembly penetrating the wall of a pressure vessel |
| DE10031470A1 (en) * | 2000-06-28 | 2002-01-10 | Krupp Werner & Pfleiderer Gmbh | gear pump |
| EP1454063B1 (en) * | 2001-12-12 | 2005-03-30 | Kreyenborg Verwaltungen und Beteiligungen GmbH & Co. KG | Feed pump |
| EP1855007A1 (en) | 2006-05-12 | 2007-11-14 | Maag Pump Systems Textron AG | Gear pump |
-
2011
- 2011-06-17 EP EP11726764.1A patent/EP2588756B1/en active Active
- 2011-06-17 WO PCT/EP2011/060133 patent/WO2012000812A2/en active Application Filing
- 2011-06-17 CN CN201180031637.1A patent/CN102959245B/en active Active
-
2012
- 2012-12-05 US US13/705,564 patent/US20130094988A1/en not_active Abandoned
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1528956A1 (en) * | 1964-09-19 | 1970-07-02 | Bosch Gmbh Robert | Pump, especially heating oil pump |
| DE19710419A1 (en) * | 1996-03-14 | 1997-11-06 | Zexel Corp | Vane type compressor for e.g. air conditioner used in motor vehicle |
| EP1164293A2 (en) * | 2000-06-14 | 2001-12-19 | Barmag AG | Gear pump with a flushing system |
| CN1355380A (en) * | 2000-11-23 | 2002-06-26 | 罗伯特·博施有限公司 | Gear conveying pump, special conveying fuel to high pressure fuel actuator |
| CN2763580Y (en) * | 2005-01-04 | 2006-03-08 | 王建干 | End face sealed integral lubricant pump |
| DE102005000686A1 (en) * | 2005-01-04 | 2006-07-13 | Zf Lenksysteme Gmbh | Rotary pump for low-viscosity fluid has channel wall forming a throttle to reduce back flow of lubricant |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2588756A2 (en) | 2013-05-08 |
| WO2012000812A3 (en) | 2013-04-25 |
| EP2588756B1 (en) | 2018-05-02 |
| CN102959245A (en) | 2013-03-06 |
| US20130094988A1 (en) | 2013-04-18 |
| WO2012000812A2 (en) | 2012-01-05 |
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