CN105422442A - Internal gear pump - Google Patents
Internal gear pump Download PDFInfo
- Publication number
- CN105422442A CN105422442A CN201511023980.8A CN201511023980A CN105422442A CN 105422442 A CN105422442 A CN 105422442A CN 201511023980 A CN201511023980 A CN 201511023980A CN 105422442 A CN105422442 A CN 105422442A
- Authority
- CN
- China
- Prior art keywords
- cover plate
- plate
- pump housing
- inside cover
- ring gear
- 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.)
- Pending
Links
Classifications
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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
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/101—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with a crescent-shaped filler element, located between the inner and outer intermeshing members
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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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
-
- 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
- F04C2/084—Toothed wheels
-
- 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
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/103—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member one member having simultaneously a rotational movement about its own axis and an orbital movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N13/00—Lubricating-pumps
- F16N13/20—Rotary pumps
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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
- F04C2210/00—Fluid
- F04C2210/10—Fluid working
- F04C2210/1044—Fuel
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses an internal gear pump which can be used more stably. The internal gear pump comprises a pump body, an oil inlet, an oil outlet, a left inner cover plate, a left outer cover plate, a right inner cover plate and a right outer cover plate, wherein the oil inlet and the oil outlet are formed in the pump body, the left inner cover plate and the left outer cover plate are arranged at the left side of the pump body, and the right inner cover plate and the right outer cover plate are arranged at the right side of the pump body; the pump body, the left inner cover plate, the left outer cover plate, the right inner cover plate and the right outer cover plate are fixedly connected through fixing bolts and nuts, and the bolts penetrate through bolt holes in the pump body; an inner gear ring is rotationally arranged in the pump body, a rotating shaft is arranged in the inner gear ring, an inner gear is arranged on the rotating shaft, the inner gear and the meshing center of the inner wall at one side of the inner gear ring deviate from each other, a sliding bearing is arranged between the left inner cover plate and the right inner cover plate, and a skeleton seal is arranged between the rotating shaft and the left outer cover plate.
Description
Technical field
The present invention relates to a kind of gear pump, particularly relate to a kind of crescent gear pump.
Background technique
The liquid of crescent gear pump for carrying viscosity larger, as lubricant oil and combustion oil, the liquid that viscosity is lower should not be carried, such as: water and gasoline etc., the liquid containing granule foreign should not be carried, affect the working life of pump, can be used as lubrication system oil pump and hydraulic system oil pump, be widely used in motor, steam turbine, centrifugal compressor, lathe and other equipment.Existing crescent gear pump, the contact ratio of internal gear and teeth groove is only 1.1, general internal gear and the contact ratio of teeth groove need can normally engage higher than 1.0, if the contact ratio of internal gear and teeth groove is designed to 1.1, just need to ensure absolute machining accuracy, too high to requirement on machining accuracy, improve processing cost, otherwise just there will be a lot of problem in engagement process, cause pump housing overall noise excessive, the plot ratio of the pump housing is on the low side, even causes the damage of the whole pump housing.Meanwhile, the water conservancy diversion effect of existing crescent gear pump pump body structure is bad, the pressure transient of pump body.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of and use more stable crescent gear pump.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: crescent gear pump, comprise: the pump housing, be arranged on the filler opening on the pump housing and oil outlet, be arranged on the left inside cover plate on the left of the pump housing and left outside cover plate, be arranged on the right inside cover plate on the right side of the pump housing and right outside cover plate, the described pump housing, left inside cover plate, left outside cover plate, right inside cover plate is fixedly connected with nut by fixing bolt with right outside cover plate, bolt is through the bolt hole on the pump housing, the inner rotation of the described pump housing is provided with ring gear, the inside of described ring gear is provided with rotating shaft, rotating shaft is provided with internal gear, described internal gear departs from mutually mutually with the side inwall center of engaging of ring gear, sliding bearing is provided with in described rotating shaft and between described left inside cover plate and right inside cover plate, reinforced seal is provided with between described rotating shaft and described left outside cover plate, seal ring is respectively arranged with at the described pump housing and between left inside cover plate and the right inside cover plate on right side, described ring gear inwall is evenly provided with some teeth groove cooperatively interacted with internal gear, the oil inlet hole that some teeth groove are interconnected evenly is provided with around the gear ring of described ring gear, between described ring gear inwall and internal gear, outer arcuate limiting board is set, arc limiting board and positioning plate, the two ends of described positioning plate are fixed on left inside cover plate and right inside cover plate respectively by mounting hole, two mounting grooves are had in the arranged outside of described arc limiting board, Stamping Steel Ribbon and spring sheet is provided with in mounting groove between described outer arcuate limiting board and arc limiting board, under the effect of spring sheet power, the internal surface of arc limiting board and internal gear fit tightly, outer surface and the ring gear of outer arcuate limiting board fit tightly, described outer arcuate limiting board, arc limiting board is divided into hyperbaric chamber and low-pressure cavity by between ring gear inwall and internal gear, described hyperbaric chamber is connected with described filler opening by oil inlet hole on ring gear, described low-pressure cavity is connected with described oil outlet by oil inlet hole on ring gear, left thrust plate is provided with between described ring gear and left inside cover plate, right thrust plate is provided with between described ring gear and right inside cover plate, described right thrust plate is identical with the structure of left thrust plate, described right thrust plate is provided with circular seal and compensates filler opening and head with point sealing compensation oil outlet, the mounting groove described right thrust plate being provided with the axis hole matched with rotating shaft and cooperatively interacting with positioning plate right-hand member, the right inside cover plate of described right thrust plate right-hand member is provided with the oil back chamber compensating filler opening and head with point sealing compensation oil outlet with circular seal and communicate, between described right thrust plate and right inside cover plate, oil back chamber edge arranges seal ring, right inside cover plate is provided with the axis hole cooperatively interacted with rotating shaft and cooperatively interacts bolt hole with bolt, the inwall of the described oil outlet place pump housing is provided with pressure regulation groove, the inwall of the pump housing in the inner chamber of the described pump housing is provided with two support blocks, the side of described support block is provided with guide pad, the upper end of described guide pad is provided with inclined-plane, the side of described guide pad is provided with directed side, the inwall of the pump housing between described two support blocks is provided with passage, contact ratio between described internal gear and teeth groove is 1.4.
This by novel advantage is: above-mentioned crescent gear pump, the contact ratio of internal gear and teeth groove reaches 1.4, internal gear uprises, gear coincidence line is elongated, the requirement on machining accuracy of gear is declined to some extent, reduce processing cost, ensure that gear can normally engage, ensure to there will not be problem in engagement process, reduce pump housing overall noise, ensure that the plot ratio of the pump housing, good sealing effect, wear-resisting property is superior, and pressure is high and stable, long service life, support water conservancy diversion is effective, makes the pressure stability of pump body.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of crescent gear pump of the present invention.
Fig. 2 is the sectional structure schematic diagram in A-A direction in Fig. 1.
Fig. 3 is the structural representation of right inside cover plate in Fig. 1.
Fig. 4 is the structural representation of right thrust plate in Fig. 1.
Fig. 5 is the structural representation of Fig. 2 middle pump body.
Fig. 6 be in Fig. 5 two support blocks at the structural representation of pump body setting position.
In figure: 1, the pump housing, 2, filler opening, 3, oil outlet, 4, left inside cover plate, 5, left outside cover plate, 6, right inside cover plate, 61, axis hole, 62, bolt hole, 7, right outside cover plate, 8, fixing bolt, 9, nut, 10, ring gear, 11, rotating shaft, 111, bolt hole, 12, internal gear, 13, sliding bearing, 14, reinforced seal, 15, seal ring, 16, teeth groove, 17, oil inlet hole, 18, outer arcuate limiting board, 19, arc limiting board, 20, positioning plate, 21, mounting hole, 22, mounting groove, 23, Stamping Steel Ribbon, 24, spring sheet, 25, hyperbaric chamber, 26, low-pressure cavity, 27, left thrust plate, 28, right thrust plate, 29, circular seal compensates filler opening, 30, head with point sealing compensation oil outlet, 31, axis hole, 32, mounting groove, 33, oil back chamber, 34, seal ring, 35, pressure regulation groove, 36, inner chamber, 37, support block, 38, guide pad, 39 inclined-planes, 40, directed side, 41, passage.
Embodiment
Particular content of the present invention is described in detail below in conjunction with the drawings and specific embodiments.
As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, shown in Fig. 6, crescent gear pump, comprise: the pump housing 1, be arranged on the filler opening 2 on the pump housing 1 and oil outlet 3, be arranged on the left inside cover plate 4 on the left of the pump housing 1 and left outside cover plate 5, be arranged on the right inside cover plate 6 on the right side of the pump housing 1 and right outside cover plate 7, the described pump housing 1, left inside cover plate 4, left outside cover plate 5, right inside cover plate 6 is fixedly connected with nut 9 by fixing bolt 8 with right outside cover plate 7, bolt 8 is through the bolt hole 111 on the pump housing 1, the inner rotation of the described pump housing 1 is provided with ring gear 10, the inside of described ring gear 10 is provided with rotating shaft 11, rotating shaft 11 is provided with internal gear 12, described internal gear 12 departs from mutually mutually with the side inwall center of engaging of ring gear 10, sliding bearing 13 is provided with in described rotating shaft 11 and between described left inside cover plate 4 and right inside cover plate 6, reinforced seal 14 is provided with between described rotating shaft 11 and described left outside cover plate 5, at the described pump housing 1 and be respectively arranged with seal ring 15 between left inside cover plate 4 and the right inside cover plate 6 on right side, described ring gear 10 inwall is evenly provided with some teeth groove 16 cooperatively interacted with internal gear 12, the oil inlet hole 17 that some teeth groove 16 are interconnected evenly is provided with around the gear ring of described ring gear 10, between described ring gear 10 inwall and internal gear 12, outer arcuate limiting board 18 is set, arc limiting board 19 and positioning plate 20, the two ends of described positioning plate 20 are fixed on left inside cover plate 4 and right inside cover plate 6 respectively by mounting hole 21, two mounting grooves 22 are had in the arranged outside of described arc limiting board 19, Stamping Steel Ribbon 23 and spring sheet 24 is provided with in mounting groove 22 between described outer arcuate limiting board 18 and arc limiting board 19, under the effect of spring sheet 24 power, the internal surface of arc limiting board 19 and internal gear 12 fit tightly, outer surface and the ring gear 10 of outer arcuate limiting board 18 fit tightly, described outer arcuate limiting board 18, arc limiting board 19 will be divided into hyperbaric chamber 25 and low-pressure cavity 26 between ring gear 10 inwall and internal gear 12, described hyperbaric chamber 25 is connected with described filler opening 2 by oil inlet hole 17 on ring gear 10, described low-pressure cavity 26 is connected with described oil outlet 3 by oil inlet hole 17 on ring gear 10, left thrust plate 27 is provided with between described ring gear 10 and left inside cover plate 4, right thrust plate 28 is provided with between described ring gear 10 and right inside cover plate 6, described right thrust plate 28 is identical with the structure of left thrust plate 27, described right thrust plate 28 is provided with circular seal and compensates filler opening 29 and head with point sealing compensation oil outlet 30, the mounting groove 32 described right thrust plate 28 being provided with the axis hole 31 matched with rotating shaft 11 and cooperatively interacting with positioning plate 20 right-hand member, the right inside cover plate 6 of described right thrust plate 28 right-hand member is provided with the oil back chamber 33 compensating filler opening 29 and head with point sealing compensation oil outlet 30 with circular seal and communicate, between described right thrust plate 28 and right inside cover plate 6, oil back chamber 33 edge arranges seal ring 34, right inside cover plate 6 is provided with the axis hole 61 cooperatively interacted with rotating shaft 11 and cooperatively interacts bolt hole 62 with bolt 8, the inwall of the described oil outlet 3 place pump housing 1 is provided with pressure regulation groove 35, the inwall of the pump housing 1 in the inner chamber 36 of the described pump housing 1 is provided with two support blocks 37, the side of described support block 37 is provided with guide pad 38, the upper end of described guide pad 38 is provided with inclined-plane 39, the side of described guide pad 38 is provided with directed side 40, the inwall of the pump housing 1 between described two support blocks 37 is provided with passage 41, contact ratio between described internal gear 12 and teeth groove 16 is 1.4, internal gear 12 uprises, and internal gear 12 is elongated with the coincidence line of teeth groove 16, declines to some extent to the requirement on machining accuracy of gear, reduce processing cost, ensure that gear can normally engage, ensure to there will not be problem in engagement process, reduce pump housing overall noise, ensure that the plot ratio of the pump housing, good sealing effect, wear-resisting property is superior, and pressure is high and stable, long service life.
When above-mentioned crescent gear pump uses, power plant drive rotating shaft 11 to rotate, rotating shaft 11 drives internal gear 12, internal gear 12 and ring gear 10 engage each other thus drive ring gear 10 to rotate, under the effect of spring sheet 24 elastic force, the internal surface of arc limiting board 19 and internal gear 12 fit tightly, oil enters from filler opening 2, successively by oil inlet hole 17 on oil inlet hole 17, low-pressure cavity 26, hyperbaric chamber 25, ring gear 10 on filler opening 2, ring gear 10, exports from oil outlet 3.
Oil back chamber 33 is flowed out by the sharp sealing compensation oil outlet 30 of head with when high pressure oil is compensated after filler opening 29 enters oil back chamber 33 by the circular seal on the left thrust plate 27 of ring gear 10 bi-side and right thrust plate 28, under the effect of high pressure oil, ring gear 10 bi-side are close to all the time by left thrust plate 28 and right thrust plate 28, keep sealing, substantially increase sealing effect.
Working procedure mesohigh oil enters mounting groove 22, when to act between outer arcuate limiting board 18 and arc limiting board 19 surperficial for pressure oil, make the internal surface of arc limiting board 19 be close to internal gear 12 all the time, the outer surface of outer arcuate limiting board 18 is close to ring gear 10 all the time.
Above-mentioned crescent gear pump, support block 37 plays the effect supporting ring gear, and when oil passes through from the passage 41 between two guide pads 38, the directed side 40 of guide pad 38 can play leading role well.
Claims (1)
1. crescent gear pump, comprise: the pump housing (1), be arranged on oil-in (2) and the oil-out (3) on the pump housing (1), be arranged on left inside cover plate (4) and the left outside cover plate (5) in the pump housing (1) left side, be arranged on right inside cover plate (6) and the right outside cover plate (7) on the pump housing (1) right side, the described pump housing (1), left inside cover plate (4), left outside cover plate (5), right inside cover plate (6) is fixedly connected with nut (9) by set bolt (8) with right outside cover plate (7), bolt (8) is through the bolt hole (111) on the pump housing (1), inner rotation at the described pump housing (1) is provided with ring gear (10), the inside of described ring gear (10) is provided with rotating shaft (11), rotating shaft (11) is provided with internal gear (12), described internal gear (12) departs from mutually mutually with the side inwall center of engaging of ring gear (10), sliding bearing (13) is provided with between described rotating shaft (11) and described left inside cover plate (4) and right inside cover plate (6), reinforced seal (14) is provided with between described rotating shaft (11) and described left outside cover plate (5), sealing ring (15) is respectively arranged with between the described pump housing (1) and the right inside cover plate (6) on left inside cover plate (4) and right side, described ring gear (10) inwall is evenly provided with some teeth groove (16) that cooperatively interact with internal gear (12), the fuel feed hole (17) that some teeth groove (16) are interconnected evenly is provided with around gear ring in described ring gear (10), between described ring gear (10) inwall and internal gear (12), outer arcuate limiting plate (18) is set, arc limiting plate (19) and location-plate (20), the two ends of described location-plate (20) are fixed on left inside cover plate (4) and right inside cover plate (6) respectively by installing hole (21), arranged outside at described arc limiting plate (19) has two mounting grooves (22), sealing strip (23) and spring leaf (24) is provided with in mounting groove (22) between described outer arcuate limiting plate (18) and arc limiting plate (19), under the effect of spring leaf (24) power, inner surface and the internal gear (12) of arc limiting plate (19) fits tightly, outer surface and the ring gear (10) of outer arcuate limiting plate (18) fit tightly, described outer arcuate limiting plate (18), arc limiting plate (19) will be divided into high pressure chest (25) and low pressure chamber (26) between ring gear (10) inwall and internal gear (12), described high pressure chest (25) is connected with described oil-in (2) by the upper fuel feed hole (17) of ring gear (10), described low pressure chamber (26) is connected with described oil-out (3) by the upper fuel feed hole (17) of ring gear (10), left valve plate (27) is provided with between described ring gear (10) and left inside cover plate (4), right valve plate (28) is provided with between described ring gear (10) and right inside cover plate (6), described right valve plate (28) is identical with the structure of left valve plate (27),Described right valve plate (28) is provided with circular seal compensation oil-in (29) and head with point sealing compensation oil-out (30), described right valve plate (28) is provided with the axis hole (31) matching with rotating shaft (11) and the mounting groove (32) cooperatively interacting with location-plate (20) right-hand member, the right inside cover plate (6) of described right valve plate (28) right-hand member is provided with the oil back chamber (33) communicating with circular seal compensation oil-in (29) and head with point sealing compensation oil-out (30), between described right valve plate (28) and right inside cover plate (6), on oil back chamber (33) edge, sealing ring (34) is set, right inside cover plate (6) is provided with the axis hole (61) that cooperatively interacts with rotating shaft (11) and with bolt (8) bolt hole (62) that cooperatively interacts, the inwall of described oil-out (3) place's pump housing (1) is provided with pressure regulation groove (35), it is characterized in that: on the inwall of the pump housing (1) in the inner chamber (36) in the described pump housing (1), be provided with two back-up blocks (37), the side of described back-up block (37) is provided with guide pad (38), the upper end of described guide pad (38) is provided with inclined-plane (39), the side of described guide pad (38) is provided with directed side (40), the inwall of the pump housing (41) between described two back-up blocks (37) is provided with passage (41), registration between described internal gear (12) and teeth groove (16) is 1.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511023980.8A CN105422442A (en) | 2015-12-31 | 2015-12-31 | Internal gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511023980.8A CN105422442A (en) | 2015-12-31 | 2015-12-31 | Internal gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105422442A true CN105422442A (en) | 2016-03-23 |
Family
ID=55500901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511023980.8A Pending CN105422442A (en) | 2015-12-31 | 2015-12-31 | Internal gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105422442A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2686432C1 (en) * | 2017-12-13 | 2019-04-25 | Глеб Юрьевич Волков | Rotary hydraulic unit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04234585A (en) * | 1990-09-01 | 1992-08-24 | Barmag Luk Automobiltechnik Gmbh & Co Kg | Internal gear pump for pressurized fluid |
| JPH04362288A (en) * | 1991-06-10 | 1992-12-15 | Shimadzu Corp | Internal gear pump |
| JPH0688576A (en) * | 1991-12-26 | 1994-03-29 | J M Voith Gmbh | Internal engaging gear pump |
| CN201843780U (en) * | 2010-10-25 | 2011-05-25 | 朱海川 | Reverse circular arc type external rotor of internal gear pump |
| CN103883517A (en) * | 2014-02-24 | 2014-06-25 | 江苏驰翔精密齿轮有限公司 | Fixed-displacement internal gear pump structure |
| CN205277794U (en) * | 2015-12-31 | 2016-06-01 | 江苏驰翔精密齿轮股份有限公司 | Gear ring pump |
-
2015
- 2015-12-31 CN CN201511023980.8A patent/CN105422442A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04234585A (en) * | 1990-09-01 | 1992-08-24 | Barmag Luk Automobiltechnik Gmbh & Co Kg | Internal gear pump for pressurized fluid |
| JPH04362288A (en) * | 1991-06-10 | 1992-12-15 | Shimadzu Corp | Internal gear pump |
| JPH0688576A (en) * | 1991-12-26 | 1994-03-29 | J M Voith Gmbh | Internal engaging gear pump |
| CN201843780U (en) * | 2010-10-25 | 2011-05-25 | 朱海川 | Reverse circular arc type external rotor of internal gear pump |
| CN103883517A (en) * | 2014-02-24 | 2014-06-25 | 江苏驰翔精密齿轮有限公司 | Fixed-displacement internal gear pump structure |
| CN205277794U (en) * | 2015-12-31 | 2016-06-01 | 江苏驰翔精密齿轮股份有限公司 | Gear ring pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2686432C1 (en) * | 2017-12-13 | 2019-04-25 | Глеб Юрьевич Волков | Rotary hydraulic unit |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160323 |
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| WD01 | Invention patent application deemed withdrawn after publication |