CN111765076A - Large-flow radial force balanced internal gear pump - Google Patents
Large-flow radial force balanced internal gear pump Download PDFInfo
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- CN111765076A CN111765076A CN202010664031.2A CN202010664031A CN111765076A CN 111765076 A CN111765076 A CN 111765076A CN 202010664031 A CN202010664031 A CN 202010664031A CN 111765076 A CN111765076 A CN 111765076A
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- gear
- oil
- end cover
- bearing
- internal
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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
- F04C2/102—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 the two members rotating simultaneously around their respective axes
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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
- F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
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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
- F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
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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
- F04C2/082—Details specially related to intermeshing engagement type machines or 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
- 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
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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
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/086—Carter
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses a large-flow radial force balanced internal gear pump in the technical field of internal gear pumps, which comprises a left end cover, a right end cover and an internal gear device, wherein the internal gear device comprises a shell, an inner gear ring, an input gear shaft, an output gear shaft and a flow isolating plate, wherein the input gear shaft and the output gear shaft are respectively provided with a first external gear and a second external gear. According to the invention, the flow isolating plate is arranged between the first outer gear and the second outer gear, so that the working oil cavity is divided into two oil suction cavities and two oil pressing cavities which are centrosymmetric; the first external gear is meshed with the inner gear ring to drive the inner gear ring to rotate, and the inner gear ring is meshed with the second external gear to drive the second external gear to rotate; further pressing the oil liquid in the two centrosymmetric oil suction cavities into the two centrosymmetric oil pressing cavities; the invention effectively increases the output flow of the internal gear pump, eliminates the radial unbalanced force, and has the advantages of large output flow, balanced radial force, long service life and the like.
Description
Technical Field
The invention relates to the technical field of gear pumps, in particular to a large-flow radial force balanced internal gear pump.
Background
The internal gear pump is widely applied to the fields of agricultural machinery, ship machinery, aerospace, precision machine tools, special equipment and the like; the gear pump is a power element of a hydraulic system, and converts mechanical energy of a prime mover into hydraulic energy of a working medium by using a meshing transmission principle of gears.
The patent application number is CN111102187.A, the specific content includes that, its structure includes the pump body, driving gear, crescent block, internal gear, axial supporting disk, the activity of pump body inner wall is provided with the internal gear, the horizontal setting in pump body middle part installs the driving gear, the driving gear is connected with the internal gear meshing, the upper end of two sets of axial supporting disks contacts with the internal gear, the axial supporting disk forms the sealed pressure chamber that forms almost zero clearance; the patent application number is CN110821822. A's an crescent gear pump, and concrete content does, its structure includes the pump body, back lid, ring gear, oil-out bedplate, input shaft, crescent moon piece, it has a circular seat hole to open on the pump body, the opening one side of seat hole is through fastening bolt fixed mounting back lid, the both ends of input shaft are passed through the bearing and are supported at the pump body and are covered after with, input shaft middle part fixed gear, gear and ring gear meshing, the ring gear place in the seat hole of the pump body, the both ends face of ring gear respectively with the seat hole bottom surface with the side surface contact of back lid.
All use a pair of internal gear pair to rotate to realize flow output, there is the problem that leads to gear life to subtract weak and internal gear pump output flow not high because of radial force is uneven.
Based on the design, the invention designs the large-flow radial force balanced internal gear pump to solve the problems.
Disclosure of Invention
The invention aims to provide a large-flow radial force balanced internal gear pump to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a large-traffic balanced crescent gear pump of radial force, includes left end lid, right-hand member lid, crescent gear device, through many first screw connections between left end lid and the right-hand member lid, crescent gear device includes casing, ring gear, input gear axle, output gear axle, flow isolating plate, the casing respectively with first recess that the left end lid was equipped with second recess interference fit that the right-hand member lid was equipped with, flow isolating plate fixes through two cylindric locks on the right-hand member lid, input gear axle install in the shaft hole that the left end lid was equipped with, input gear axle supports through first bearing left end lid and right-hand member are covered, output gear axle supports through the second bearing left end lid and right-hand member are covered.
Preferably, the shell of the internal gear device is in interference fit with the inner gear ring of the internal gear device, a first external gear is arranged on an input gear shaft of the internal gear device, a second external gear is arranged on an output gear shaft of the internal gear device, the first external gear, the second external gear and the inner gear ring have the same tooth width, power drives the input gear shaft to rotate, the input gear shaft drives the first external gear to rotate, the first external gear and the inner gear ring are in internal gear transmission to further drive the inner gear ring to rotate, and the inner gear ring and the second external gear are in internal gear transmission to further drive the second external gear to rotate.
Preferably, the flow partition plate of the internal gearing device is installed between the first external gear and the second external gear, the left and right surfaces of the flow partition plate are respectively contacted with the gear teeth of the first external gear and the second external gear, the flow partition plate, the first external gear and the second external gear divide a working oil cavity formed by the shell, the inner gear ring, the left end cover and the right end cover into two oil suction cavities which are centrosymmetric and two pressure oil cavities which are centrosymmetric, and the first external gear and the second external gear are respectively in meshing transmission with the inner gear ring so as to correspondingly press pressure oil flowing into the two oil suction cavities which are centrosymmetric into the two pressure oil cavities.
Preferably, an oil inlet hole is formed in the outer side of the left end cover, an oil inlet hole channel is formed in the left end cover and is communicated with the oil inlet hole, the oil inlet hole channel is communicated with the two oil suction cavities which are centrosymmetric, two bearing holes are formed in the inner surface of the left end cover and are in interference fit with the first bearing and the second bearing respectively, a first bearing retainer ring is installed on the first bearing, and a second bearing retainer ring is installed on the second bearing.
Preferably, the right-hand member lid outside is equipped with the oil outlet, the inside oil return pore that has opened of right-hand member lid, oil return pore communicates with each other with the oil outlet, oil return pore communicates with each other with two pressure oil chamber that are central symmetry respectively, right-hand member lid inboard is equipped with two cylinder pinhole and two dead eye, two dead eyes respectively with first bearing, second bearing interference fit, install first bearing retainer ring on the first bearing, second bearing retainer ring is installed to the second bearing.
Compared with the prior art, the invention has the beneficial effects that: a flow partition plate is arranged between the first outer gear and the second outer gear, so that a working oil cavity formed by the shell, the inner gear ring, the first outer gear, the second outer gear, the left end cover and the right end cover is divided into two oil suction cavities which are centrosymmetric and two oil pressing cavities which are centrosymmetric; after pressure oil flows into an oil inlet pipeline through an oil inlet hole of the left end cover, the pressure oil is divided to flow into two oil suction cavities which are centrosymmetric; the external force drives the input gear shaft to rotate so as to drive the first external gear to rotate, the first external gear is in meshing transmission with the inner gear ring so as to drive the inner gear ring to rotate, and the inner gear ring is in meshing transmission with the second external gear so as to drive the second external gear to rotate; the first external gear and the second external gear are respectively meshed with the inner gear ring for transmission, so that the pressure oil in the two centrosymmetric oil suction cavities is pressed into the two centrosymmetric oil pressing cavities; two centrosymmetric pressure oil cavities are communicated with an oil return pipeline of the right end cover, so that pressure oil flows into the oil return pipeline from the pressure oil cavities and then flows out of an oil outlet hole of the right end cover; the invention effectively increases the output flow of the internal gear pump, eliminates the radial unbalanced force, and has the advantages of large output flow, long service life and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a schematic cross-sectional view of a left end cap of the present invention;
FIG. 4 is a schematic cross-sectional view of the right end cap of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1-left end cover, 101-shaft hole, 102-oil inlet hole, 103-oil inlet channel, 104-bearing hole, 105-first groove, 2-oil seal rubber sealing ring, 3-first bearing, 4-first bearing retainer ring, 5-input gear shaft, 501-first external gear, 6-flow partition plate, 7-internal gear ring, 8-output gear shaft, 801-second external gear, 9-shell, 10-cylindrical pin, 11-second bearing, 12-second bearing retainer ring, 13-right end cover, 1301-oil outlet hole, 1302-oil outlet channel, 1303-bearing hole, 1304-cylindrical pin hole, 1305-second groove and 14-first screw.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
As shown in fig. 1, 2, 3 and 4, the large-flow radial force balanced crescent gear pump comprises a left end cover 1, a right end cover 13 and a crescent gear device, wherein the left end cover 1 is connected with the right end cover 13 through a plurality of first screws 14, the crescent gear device comprises a shell 9, an inner gear ring 7, an input gear shaft 5, an output gear shaft 8 and a flow isolating plate 6, the shell 9 is respectively in interference fit with a first groove 105 arranged on the left end cover 1 and a second groove 1305 arranged on the right end cover 13, the flow isolating plate 6 is arranged on the right end cover 13 through two cylindrical pins 10, the input gear shaft 5 is arranged in a shaft hole 101 arranged on the left end cover 1, the input gear shaft 5 is supported on the left end cover 1 and the right end cover 13 through a first bearing 3, and the output gear shaft 8 is supported on the left end cover 1 and the right end cover 13 through a second bearing 11.
As shown in fig. 1 and 2, a housing 9 of the ring gear device is in interference fit with an inner gear ring 7 of the ring gear device, a first external gear 501 is arranged on an input gear shaft 5 of the ring gear device, a second external gear 801 is arranged on an output gear shaft 8 of the ring gear device, the first external gear 501, the second external gear 801 and the inner gear ring 7 have the same tooth width, power drives the input gear shaft 5 to rotate, the input gear shaft 5 drives the first external gear 501 to rotate, the first external gear 501 is in inner gear transmission with the inner gear ring 7 and further drives the inner gear ring 7 to rotate, and the inner gear ring 7 is in inner gear transmission with the second external gear 801 and further drives the second external.
As shown in fig. 1 and 2, the flow divider 6 of the internal gear device is installed between the first external gear 501 and the second external gear 801, the left and right surfaces of the flow divider 6 are respectively in contact with the gear teeth of the first external gear 501 and the second external gear 801, the flow divider 6, the first external gear 501 and the second external gear 801 divide a working oil cavity formed by the housing 9, the inner gear 7, the left end cover 1 and the right end cover 13 into two oil suction cavities in central symmetry and two oil pressing cavities in central symmetry, and the first external gear 501 and the second external gear 801 are respectively in meshing transmission with the inner gear 7 to correspondingly press the pressure oil flowing into the two oil suction cavities in central symmetry into the two oil pressing cavities in central symmetry.
As shown in fig. 1 and fig. 3, an oil inlet 102 is arranged on the outer side of the left end cover 1, an oil inlet hole passage 103 is formed in the left end cover 1, the oil inlet hole passage 103 is communicated with the oil inlet 102, the oil inlet hole passage 103 is respectively communicated with two oil suction chambers which are centrosymmetric, pressure oil flows into the oil inlet hole passage 103 through the oil inlet 102 and then flows into the two oil suction chambers which are centrosymmetric in a split manner, two bearing holes 104 are formed in the inner surface of the left end cover 1, the two bearing holes 104 are respectively in interference fit with the first bearing 3 and the second bearing 11, the first bearing retainer 4 is installed on the first bearing 3, and the second bearing retainer 12 is installed on the.
As shown in fig. 1 and 4, an oil outlet 1301 is arranged on the outer side of the right end cover 13, an oil return hole 1302 is formed in the right end cover 13, the oil return hole 1302 is communicated with the oil outlet 1301, the oil return hole 1302 is respectively communicated with two centrosymmetric oil pressing cavities, pressure oil is pressed into the two centrosymmetric oil pressing cavities, flows into the oil return hole 1302, is collected and flows out through the oil outlet 1301, two cylindrical pin holes 1304 and two bearing holes 1303 are arranged on the inner side of the right end cover 13, the two bearing holes 1303 are respectively in interference fit with the first bearing 3 and the second bearing 11, a first bearing retainer 4 is mounted on the first bearing 3, and a second bearing retainer 12 is mounted on the second bearing 11.
When the oil-pressure separation type oil pump works, the flow separation plate 6 is arranged between the first external gear 501 and the second external gear 801, so that a working oil cavity formed by the shell 9, the inner gear ring 7, the first external gear 501, the second external gear 801, the left end cover 1 and the right end cover 13 is divided into two oil suction cavities which are centrosymmetric and two oil pressing cavities which are centrosymmetric; after pressure oil flows into an oil inlet pipeline 103 through an oil inlet hole 102 of the left end cover 1, the pressure oil is divided to flow into two centrosymmetric oil suction cavities; the external force drives the input gear shaft 5 to rotate so as to drive the first external gear 501 to rotate, the first external gear 501 is in meshing transmission with the internal gear ring 7 so as to drive the internal gear ring 7 to rotate, and the internal gear ring 7 is in meshing transmission with the second external gear 801 so as to drive the second external gear 801 to rotate; the first external gear 501 and the second external gear 801 are respectively meshed with the inner gear ring 7 for transmission, so that the pressure oil in the two centrosymmetric oil suction cavities is pressed into the two centrosymmetric oil pressing cavities; two centrosymmetric oil pressing cavities are communicated with the oil return pipeline 1302 of the right end cover 13, so that pressure oil flows into the oil return pipeline 1302 from the oil pressing cavities and then flows out from the oil outlet hole 1301 of the right end cover.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. A large-flow radial force balanced internal gear pump comprises a left end cover (1), a right end cover (13) and an internal gear device, wherein the left end cover (1) is connected with the right end cover (13) through a plurality of first screws (14), the internal gear device comprises a shell (9), an internal gear ring (7), an input gear shaft (5), an output gear shaft (8) and a flow isolating plate (6), the shell (9) is in interference fit with a first groove (105) formed in the left end cover (1) and a second groove (1305) formed in the right end cover (13), the flow isolating plate (6) in the internal gear device is installed on the right end cover (13) through two cylindrical pins (10), the input gear shaft (5) in the internal gear device is installed in a shaft hole (101) formed in the left end cover (1), and the input gear shaft (5) is supported on the left end cover (1) and the right end cover (13) through a first bearing (3), an output gear shaft (8) of the ring gear device is supported on the left end cover (1) and the right end cover (13) through a second bearing (11).
2.A high flow rate radial force balanced crescent gear pump according to claim 1, wherein: casing (9) among the internal-engagement device with ring gear (7) interference fit among the internal-engagement device, be equipped with first external gear (501) on input gear axle (5) among the internal-engagement device, be equipped with second external gear (801) on output gear axle (8) among the internal-engagement device, first external gear (501), second external gear (801) are the same with the tooth width of ring gear (7), and power drives input gear axle (5) rotates, input gear axle (5) drive first external gear (501) and rotate, first external gear (501) and ring gear (7) internal gearing transmission and then drive ring gear (7) and rotate, ring gear (7) and second external gear (801) internal gearing transmission and then drive second external gear (801) and rotate.
3. A high flow rate radial force balanced crescent gear pump according to claim 2, wherein: a flow partition plate (6) in the internal meshing device is installed between a first external gear (501) and a second external gear (801), the left surface and the right surface of the flow partition plate (6) are respectively in contact with gear teeth of the first external gear (501) and the second external gear (801), a working oil cavity formed by the shell (9), the inner gear ring (7), the left end cover (1) and the right end cover (13) is divided into two oil suction cavities which are centrosymmetric and two oil pressing cavities which are centrosymmetric by the flow partition plate (6), the first external gear (501) and the second external gear (801) respectively in meshing transmission with the inner gear ring (7) so as to correspondingly press pressure oil flowing into the two oil suction cavities which are centrosymmetric into the two oil pressing cavities.
4. A high flow rate radial force balanced crescent gear pump according to claim 3, wherein: the oil-pressure-bearing oil pump is characterized in that an oil inlet hole (102) is formed in the outer side of the left end cover (1), an oil inlet hole channel (103) is formed in the left end cover (1), the oil inlet hole channel (103) is communicated with the oil inlet hole (102), the oil inlet hole channel (103) is communicated with two oil suction cavities which are centrosymmetric, pressure oil flows into the two oil suction cavities which are centrosymmetric in a split mode after flowing into the oil inlet hole channel (103) through the oil inlet hole (102), two bearing holes (104) are formed in the inner surface of the left end cover (1), the two bearing holes (104) are in interference fit with a first bearing (3) and a second bearing (11) respectively, a first bearing retainer ring (4) is installed on the first bearing (3), and a second bearing retainer ring (12) is installed on the.
5. A large flow radial force balanced crescent gear pump according to claim 4, wherein: right-hand member lid (13) outside is equipped with oil outlet (1301), right-hand member lid (13) inside is opened there is oil return pore (1302), oil return pore (1302) communicate with each other with oil outlet (1301), oil return pore (1302) communicate with each other with two pressure oil chambers that are central symmetry respectively, and pressure oil is impressed and flows in behind two pressure oil chambers that are central symmetry oil return pore (1302) collect the back warp oil outlet (1301) flow out, right-hand member lid (13) inboard is equipped with two cylinder pinhole (1304) and two dead eye (1303), two dead eye (1303) respectively with first bearing (3), second bearing (11) interference fit, install first bearing retainer ring (4) on first bearing (3), second bearing retainer ring (12) are installed in second bearing (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010664031.2A CN111765076A (en) | 2020-07-10 | 2020-07-10 | Large-flow radial force balanced internal gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010664031.2A CN111765076A (en) | 2020-07-10 | 2020-07-10 | Large-flow radial force balanced internal gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111765076A true CN111765076A (en) | 2020-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010664031.2A Pending CN111765076A (en) | 2020-07-10 | 2020-07-10 | Large-flow radial force balanced internal gear pump |
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| Country | Link |
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| CN (1) | CN111765076A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1243564A (en) * | 1997-01-08 | 2000-02-02 | 蒂莫西·查尔斯·伍德豪斯 | Fluid pump with flexible toothed belt |
| CN201176930Y (en) * | 2007-05-26 | 2009-01-07 | 吴涛慧 | Gear ring pump |
-
2020
- 2020-07-10 CN CN202010664031.2A patent/CN111765076A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1243564A (en) * | 1997-01-08 | 2000-02-02 | 蒂莫西·查尔斯·伍德豪斯 | Fluid pump with flexible toothed belt |
| CN201176930Y (en) * | 2007-05-26 | 2009-01-07 | 吴涛慧 | Gear ring pump |
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Application publication date: 20201013 |
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