CN106894990A - A kind of gear pump of balanced radial force - Google Patents
A kind of gear pump of balanced radial force Download PDFInfo
- Publication number
- CN106894990A CN106894990A CN201510962801.0A CN201510962801A CN106894990A CN 106894990 A CN106894990 A CN 106894990A CN 201510962801 A CN201510962801 A CN 201510962801A CN 106894990 A CN106894990 A CN 106894990A
- Authority
- CN
- China
- Prior art keywords
- gear
- pump
- oil
- housing shell
- pump housing
- 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
-
- 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
- F04C2/18—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 with similar tooth forms
-
- 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
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
-
- 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
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with or adaptation to specific driving engines or motors
-
- 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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
-
- 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
- F04C2240/00—Components
- F04C2240/30—Casings or housings
Abstract
The present invention relates to hydraulic power source device, specifically a kind of gear pump of balanced radial force.Including gear pump rear end cap, pump housing shell, gear pump drive end bearing bracket, four-wheel link gear and motor, before its middle pump body shell, rear end is respectively equipped with gear pump drive end bearing bracket and gear pump rear end cap, accommodating cavity is provided with the pump housing shell, the first oil inlet for being connected with accommodating cavity is circumferentially sequentially provided with the pump housing shell, first oil-out, second oil inlet and the second oil-out, the four-wheel link gear is placed in the accommodating cavity of pump housing shell, and be connected with the output shaft of motor, the driving that the four-wheel link gear passes through motor, realize high pressure oil extraction while oil suction and first oil-out and the second oil-out while first oil inlet and the second oil inlet.The reaction force that gear is produced is cancelled out each other the invention enables hydraulic oil, balances radial load, therefore extend the life-span of gear pump, there is provided bigger pressure.
Description
Technical field
The present invention relates to hydraulic power source device, specifically a kind of gear pump of balanced radial force.
Background technology
Gear pump is to intermesh to reach oil suction using the identical involute gear of a pair of parameters in the pump housing
With the purpose of force feed, conventional hydraulic pumps have simple structure, self-priming performance good, and the pollution to fluid is unwise
The advantages of sense, reliable operation.Meshing gear in gear pump is axisymmetric rotary body, therefore allows to turn
Speed is higher.During gear pump work, oil suction pressure and work are respectively subjected in the gear of oil sucting cavity and pumping cavity
Pressure, in the radial clearance of gear and pump housing inner surface, low-pressure gradually transition of the pressure from oil sucting cavity
To the high pressure of pumping cavity, therefore gear bears the effect of the radial load produced by circumference fluid pressure, and
And operating pressure is higher, radial imbalance force is bigger, and the imbalance of radial load not only accelerates the mill of bearing
Damage and deform, cause the friction of tooth top and pump housing inner surface so that the raising of gear pump pressure is restricted.
The content of the invention
Regarding to the issue above, it is an object of the invention to provide a kind of gear pump structure of balanced radial force.Should
Gear pump can balance radial load, with that the reliability that operates steadily, noise be low, the life-span is high and discharge capacity is big etc. is excellent
Point.
To achieve these goals, the present invention uses following technical scheme：
A kind of gear pump of balanced radial force, including gear pump rear end cap, pump housing shell, gear pump drive end bearing bracket,
Four-wheel link gear and motor, the front and back ends of its middle pump body shell are respectively equipped with gear pump drive end bearing bracket and gear
Pump rear end cap, is provided with accommodating cavity in the pump housing shell, be circumferentially sequentially provided with the pump housing shell and institute
The first oil inlet, the first oil-out, the second oil inlet and second oil-out of accommodating cavity connection are stated, it is described
Four-wheel link gear be placed in the accommodating cavity of the pump housing shell and with the motor being arranged at outside pump housing shell
Output shaft connection, the driving that the four-wheel link gear passes through the motor realizes first oil-feed
Mouthful and oil suction and pressure high while first oil-out and the second oil-out while the second oil inlet
Oil.
The four-wheel link gear includes first gear, second gear, the 3rd gear and the 4th gear, institute
The gear support shaft for stating first gear, second gear, the 3rd gear and the 4th gear is parallel to each other and each
Gear support shaft two ends are rotatably installed on the gear pump drive end bearing bracket and gear pump rear end cap respectively, described
First gear is engaged with second gear and the 4th gear, the 3rd gear and second gear and the 4th gear
Engagement, the gear support shaft of the first gear through the gear pump drive end bearing bracket and by shaft coupling with
The output shaft connection of the motor.
The diameter of the first gear, second gear, the 3rd gear and the 4th gear is identical.
The pump housing shell is provided with two pin shaft holes with diameter parallel, each pin shaft hole and is inserted with necessarily
Position pin, the two ends of the alignment pin are connected with the gear pump rear end cap and gear pump drive end bearing bracket respectively.
Two pin shaft holes are symmetricly set on the pump housing shell.
Circumferentially arranged with multiple screw holes on the pump housing shell, the gear pump rear end cap and gear pump front end
Screw hole by screw respectively with the pump housing shell two ends is covered to be fixedly connected, the gear pump drive end bearing bracket and
Packing ring is provided between the pump housing shell.
Screw hole on the pump housing shell is four.
First oil inlet and the second oil inlet are symmetricly set in the opposite sides of the pump housing shell, described
First oil-out and the second oil-out are symmetricly set in another opposite sides of the pump housing shell.
It is low that first oil inlet encloses to be formed first with the first gear, the 4th gear and pump housing shell
Pressure chamber is connected, and second oil inlet is enclosed and formed with the second gear, the 3rd gear and pump housing shell
The second low pressure chamber be connected, first oil-out and the first gear, second gear and pump housing shell
Enclose the first high pressure chest to be formed to be connected, second oil-out and the 3rd gear, the 4th gear and pump
Body shell encloses the second high pressure chest to be formed and is connected.
The invention has the advantages that and beneficial effect：
1. the present invention uses the mechanical structure of four gear linkage types so that the anti-work that hydraulic oil is produced to gear
Firmly cancel out each other, balance radial load, therefore extend the life-span of gear pump, there is provided bigger pressure.
2. there are two inlet ports and two force feed mouths in mechanism of the present invention, and the hydraulic oil in two force feed mouths can be with
It is merged together to form huge discharge, drives same executing agency, therefore meet equipment for rapidity
Requirement.
3. the present invention uses symmetrical structure, and the discharge capacity of two force feed mouths is identical, is capable of achieving two differences
Executing agency is synchronized with the movement.
4. structure of the present invention using four gear linkage types mechanical structure, equivalent to by two traditional gears
Parallel connection of pumps is good to together, having the advantages that low manufacture cost, cost performance.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the structural representation of four-wheel link gear in the present invention；
Fig. 3 is the structural representation of middle pump body shell of the present invention.
Wherein：1 is gear pump rear end cap, and 2 is packing ring, and 3 is pump housing shell, and 301 is the first low pressure chamber,
302 is the first oil inlet, and 303 is the first high pressure chest, and 304 is the first oil-out, and 305 is the second low pressure
Chamber, 306 is the second oil inlet, and 307 is the second high pressure chest, and 308 is the second oil-out, and 309 is bearing pin
Hole, 310 is screw hole, and 4 is alignment pin, and 5 is gear pump drive end bearing bracket, and 6 is screw, and 7 link for four-wheel
Mechanism, 701 is first gear, and 702 is second gear, and 703 is the 3rd gear, and 704 is the 4th gear,
705 is first gear support shaft, and 706 is second gear support shaft, and 707 is the 3rd gear support shaft, 708
It is the 4th gear support axle, 8 is shaft coupling, and 9 is motor.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
As Figure 1-3, a kind of gear pump of balanced radial force that the present invention is provided, including gear pump rear end
Lid 1, pump housing shell 3, gear pump drive end bearing bracket 5, four-wheel link gear 7 and motor 9, its middle pump body shell 3
Front and back ends be respectively equipped with gear pump drive end bearing bracket 5 and gear pump rear end cap 1, is provided with the pump housing shell 3
Accommodating cavity, is circumferentially sequentially provided with the first oil inlet for being connected with the accommodating cavity on the pump housing shell 3
302nd, the first oil-out 304, the second oil inlet 306 and the second oil-out 308, the four-wheel gear
Structure 7 be placed in the accommodating cavity of the pump housing shell 3 and with the motor 9 being arranged at outside pump housing shell 3
Output shaft is connected, and the driving that the four-wheel link gear 7 passes through the motor 9 realizes that described first enters
Oil suction and the oil-out of first oil-out 304 and second while 302 and second oil inlet 306 of hydraulic fluid port
High pressure oil extraction while 308.
The four-wheel link gear 7 include first gear 701, second gear 702, the 3rd gear 703 and
4th gear 704, wherein first gear 701 are sleeved in first gear support shaft 705 and with described
One gear support shaft 705 is bonded and connects, the second gear 702 is sleeved in second gear support shaft 706,
And be bonded with the second gear support shaft 706 and connect, the 3rd gear 703 is sleeved on the 3rd gear branch
It is bonded on support axle 707 and with the 3rd gear support shaft 707 and connects, the 4th gear 704 is set with
It is bonded on the 4th gear support axle 708 and with the 4th gear support axle 708 and connects.Described first
Gear support shaft 705, second gear support shaft 706, the 3rd gear support shaft 707 and the 4th gear support
Axle 708 is parallel to each other laying and the two ends of each gear support shaft are installed in rotation on respectively by bearing
On the gear pump drive end bearing bracket 5 and gear pump rear end cap 1.The first gear 701, second gear 702,
3rd gear 703 and the 4th gear 704 are engaged two-by-two successively, form closed-loop drive, i.e., described first tooth
Wheel 701 is engaged with the gear 704 of second gear 702 and the 4th, the 3rd gear 703 and second gear
702 and the 4th gear 704 engage.The first gear support shaft 705 through the gear pump drive end bearing bracket 5,
And be connected with the output shaft of the motor 9 by shaft coupling 8.
The diameter of the first gear 701, second gear 702, the 3rd gear 703 and the 4th gear 704
It is identical, make first oil-out 304 identical with the discharge capacity of the second oil-out 308, it is capable of achieving two not
With being synchronized with the movement for executing agency.
As shown in figure 3, two pin shaft holes 309 with diameter parallel are arranged with the pump housing shell 3, respectively
Be inserted with an alignment pin 4 in pin shaft hole 309, the two ends of the alignment pin 4 respectively with the gear pump after
End cap 1 and gear pump drive end bearing bracket 5 are connected, and realize the gear pump rear end cap 1 and gear pump drive end bearing bracket 5
Positioning.Multiple screw holes 310, the gear pump rear end cap 1 are circumferentially additionally provided with the pump housing shell 3
Fixed with the screw hole 310 at the two ends of pump housing shell 3 respectively by screw 6 with gear pump drive end bearing bracket 5 and connected
Connect, packing ring 2 is provided between the gear pump drive end bearing bracket 5 and the pump housing shell 3.It is described in the present embodiment
Screw hole 310 is four.
First oil inlet 302 is symmetricly set in the relative of the pump housing shell 3 with the second oil inlet 306
Both sides, the oil-out 308 of first oil-out 304 and second is symmetricly set in the another of the pump housing shell 3
One opposite sides.First oil inlet 302 and the first gear 701, the 4th gear 704 and the pump housing
Shell 3 encloses the first low pressure chamber 301 to be formed and is connected, second oil inlet and the second gear 702,
3rd gear 703 and pump housing shell 3 enclose the second low pressure chamber 305 to be formed and are connected, and described first is fuel-displaced
Mouth 304 encloses the first high pressure chest to be formed with the first gear 701, second gear 702 and pump housing shell 3
303 are connected, the gear 703 of second oil-out 308 and the 3rd, the 4th gear 704 and pump housing shell 3
The second high pressure chest 307 to be formed is enclosed to be connected.
The present invention is symmetrical arranged using two oil-outs so that the reaction force phase that hydraulic oil is produced to gear
Mutually offset, balance radial load, therefore extend the life-span of gear pump, there is provided bigger pressure.The present invention
Using symmetrical structure, the discharge capacities of two force feed mouths are identicals, are capable of achieving the same of two different executing agencies
Step motion.Hydraulic oil in two oil-outs can also be merged together to form huge discharge, drive same
Executing agency, therefore meet requirement of the equipment for rapidity.
Operation principle of the invention is：
The output shaft of the motor 9 is coaxially connected with the first gear support shaft 705, when the motor 9
When driving first gear support shaft 705 to be rotated clockwise, it is sleeved in first gear support shaft 705
First gear 701 turn clockwise with first gear support shaft 705, the first gear 701 is same
When drive second gear 702, the 4th gear 704 to rotate in an anti-clockwise direction, second gear 702 it is counterclockwise
Rotation can drive the 3rd gear 703 to turn clockwise, the drive the 4th that turns clockwise of the 3rd gear 703
The rotate counterclockwise of gear 704.The first gear 701 is being leaned on when driving the 4th gear 704 to rotate
The gear of side two of nearly first oil inlet 302 gradually exits engagement so that the first low pressure chamber 301
Volume increases and forms vacuum.Now hydraulic oil enters into the first low pressure chamber in the presence of external atmosphere pressure
In 301, and then hydraulic oil has advanced to the sky between first gear 701, the gear teeth of the 4th gear 704
In gap, and with first gear 701, the rotation of the 4th gear 704, hydraulic oil is updated to first respectively
The high pressure chest 307 of high pressure chest 303 and second, when second gear 702 drives the 3rd gear 703 to rotate,
Engagement is gradually backed out in the gear of side two near the second oil inlet 306 so that the second low pressure chamber 3-5
Volume increase and form vacuum.Now that second has been entered into the presence of external atmosphere pressure is low for hydraulic oil
In pressure chamber 3-5, and then hydraulic oil has been advanced between second gear 702, the gear teeth of the 3rd gear 703
Space in, and with second gear 702, the rotation of the 3rd gear 703, hydraulic oil is updated to respectively
First high pressure chest 303 and the second high pressure chest 307.First gear 701 drive second gear 702 rotation when
Wait and gradually enter engagement in the gear of side two near the first oil-out 304, now first gear 701
Just it has been squeezed into the first high pressure chest 303 with the hydraulic oil in the clearance between gear teeth of second gear 702, so that
The hydraulic oil that the hydraulic oil of script low-pressure becomes high pressure is flowed out from the first oil-out 304, and then
The executing agency that driving is connected with the first oil-out 304, the 3rd gear 703 drives the 4th gear 704
Gradually enter engagement in the gear of side two near the second oil-out 308 when rotation, now the
Hydraulic oil in three gears 703 and the clearance between gear teeth of the 4th gear 704 has just been squeezed into the second high pressure chest 307
In, so as to the hydraulic oil that the hydraulic oil of script low-pressure becomes high pressure be flowed from the second oil-out 308
Go out, and then drive the executing agency being connected with the second oil-out 308.
Structure of the present invention using four gear linkage types mechanical structure, equivalent to by two traditional gear pumps
It is parallel to together, has the advantages that low manufacture cost, cost performance are good.
Claims (9)
1. a kind of gear pump of balanced radial force, it is characterised in that including gear pump rear end cap (1), pump
Body shell (3), gear pump drive end bearing bracket (5), four-wheel link gear (7) and motor (9), its middle pump body shell
(3) front and back ends are respectively equipped with gear pump drive end bearing bracket (5) and gear pump rear end cap (1), the pump
Accommodating cavity is provided with body shell (3), is circumferentially sequentially provided with the pump housing shell (3) accommodating with described
First oil inlet (302), the first oil-out (304), second oil inlet (306) and second of chamber connection
Oil-out (308), the four-wheel link gear (7) is placed in the accommodating cavity of the pump housing shell (3),
And the output shaft of the motor (9) outside with pump housing shell (3) is arranged at is connected, the four-wheel link gear
(7) by the driving of the motor (9), first oil inlet (302) and the second oil inlet are realized
(306) it is high while oil suction and first oil-out (304) and the second oil-out (308) while
Pressure oil.
2. the gear pump of balanced radial force according to claim 1, it is characterised in that the four-wheel
Link gear (7) including first gear (701), second gear (702), the 3rd gear (703) and
4th gear (704), the first gear (701), second gear (702), the 3rd gear (703)
And the 4th the gear support shaft of gear (704) be parallel to each other and each gear support shaft two ends rotate peace respectively
On the gear pump drive end bearing bracket (5) and gear pump rear end cap (1), the first gear (701)
Engaged with second gear (702) and the 4th gear (704), the 3rd gear (703) and the second tooth
Wheel (702) and the engagement of the 4th gear (704), the gear support shaft of the first gear (701) are passed through
The gear pump drive end bearing bracket (5) is simultaneously connected by shaft coupling (8) with the output shaft of the motor (9).
3. the gear pump of balanced radial force according to claim 2, it is characterised in that described first
The diameter of gear (701), second gear (702), the 3rd gear (703) and the 4th gear (704)
It is identical.
4. the gear pump of balanced radial force according to claim 2, it is characterised in that the pump housing
Shell (3) is provided with two pin shaft holes (309) with diameter parallel, each pin shaft hole (309) and plugs
Have an alignment pin (4), the two ends of the alignment pin (4) respectively with the gear pump rear end cap (1) and
Gear pump drive end bearing bracket (5) is connected.
5. the gear pump of balanced radial force according to claim 4, it is characterised in that described in two
Pin shaft hole (309) is symmetricly set on the pump housing shell (3).
6. the gear pump of balanced radial force according to claim 4, it is characterised in that the pump housing
Circumferentially arranged with multiple screw holes (310) on shell (3), the gear pump rear end cap (1) and gear pump
Screw hole (310) of the drive end bearing bracket (5) by screw (6) respectively with pump housing shell (3) two ends is solid
Fixed connection, packing ring (2) is provided between the gear pump drive end bearing bracket (5) and the pump housing shell (3).
7. the gear pump of balanced radial force according to claim 6, it is characterised in that the pump housing
Screw hole (310) on shell (3) is four.
8. the gear pump of balanced radial force according to claim 2, it is characterised in that described first
Oil inlet (302) is symmetricly set in the opposite sides of the pump housing shell (3) with the second oil inlet (306),
First oil-out (304) and the second oil-out (308) are symmetricly set in the pump housing shell (3)
Another opposite sides.
9. the gear pump of balanced radial force according to claim 8, it is characterised in that described first
Oil inlet (302) is enclosed with the first gear (701), the 4th gear (704) and pump housing shell (3)
The first low pressure chamber (301) for being formed is connected, second oil inlet and the second gear (702),
3rd gear (703) and pump housing shell (3) enclose the second low pressure chamber (305) to be formed and are connected, described
First oil-out (304) and the first gear (701), second gear (702) and pump housing shell (3)
Enclose the first high pressure chest (303) to be formed to be connected, second oil-out (308) and the 3rd gear
(703), the 4th gear (704) and pump housing shell (3) enclose the second high pressure chest (307) to be formed and are connected
It is logical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510962801.0A CN106894990A (en) | 2015-12-21 | 2015-12-21 | A kind of gear pump of balanced radial force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510962801.0A CN106894990A (en) | 2015-12-21 | 2015-12-21 | A kind of gear pump of balanced radial force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106894990A true CN106894990A (en) | 2017-06-27 |
Family
ID=59191447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510962801.0A Pending CN106894990A (en) | 2015-12-21 | 2015-12-21 | A kind of gear pump of balanced radial force |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106894990A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB778523A (en) * | 1956-01-18 | 1957-07-10 | Roper Corp Geo D | Fluid gear pump or motor |
| CN1948759A (en) * | 2005-10-11 | 2007-04-18 | 徐晓旭 | Wear and tear resistant gear pump |
| CN201121581Y (en) * | 2007-11-02 | 2008-09-24 | 邢台市小龙王精密液压泵业有限公司 | High pressure-resistant anti-overloading gear pump |
| CN201335010Y (en) * | 2008-12-31 | 2009-10-28 | 经纬纺织机械股份有限公司 | Viscose staple fibre metering pump |
| CN201851356U (en) * | 2010-03-16 | 2011-06-01 | 吕敬辉 | Radial pressure balanced gear pump |
| CN203130495U (en) * | 2013-03-20 | 2013-08-14 | 浙江师范大学 | Gear pump with adjustable output volume |
| CN204175591U (en) * | 2014-09-25 | 2015-02-25 | 平顶山东方碳素股份有限公司 | A kind of four gear type gear pumps for hydraulic system |
| CN205225668U (en) * | 2015-12-21 | 2016-05-11 | 中国科学院沈阳自动化研究所 | Balanced gear pump of radial force |
-
2015
- 2015-12-21 CN CN201510962801.0A patent/CN106894990A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB778523A (en) * | 1956-01-18 | 1957-07-10 | Roper Corp Geo D | Fluid gear pump or motor |
| CN1948759A (en) * | 2005-10-11 | 2007-04-18 | 徐晓旭 | Wear and tear resistant gear pump |
| CN201121581Y (en) * | 2007-11-02 | 2008-09-24 | 邢台市小龙王精密液压泵业有限公司 | High pressure-resistant anti-overloading gear pump |
| CN201335010Y (en) * | 2008-12-31 | 2009-10-28 | 经纬纺织机械股份有限公司 | Viscose staple fibre metering pump |
| CN201851356U (en) * | 2010-03-16 | 2011-06-01 | 吕敬辉 | Radial pressure balanced gear pump |
| CN203130495U (en) * | 2013-03-20 | 2013-08-14 | 浙江师范大学 | Gear pump with adjustable output volume |
| CN204175591U (en) * | 2014-09-25 | 2015-02-25 | 平顶山东方碳素股份有限公司 | A kind of four gear type gear pumps for hydraulic system |
| CN205225668U (en) * | 2015-12-21 | 2016-05-11 | 中国科学院沈阳自动化研究所 | Balanced gear pump of radial force |
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