CN106321422A - Two-stage internal gear pump - Google Patents
Two-stage internal gear pump Download PDFInfo
- Publication number
- CN106321422A CN106321422A CN201610866443.8A CN201610866443A CN106321422A CN 106321422 A CN106321422 A CN 106321422A CN 201610866443 A CN201610866443 A CN 201610866443A CN 106321422 A CN106321422 A CN 106321422A
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- China
- Prior art keywords
- sealing plate
- stage
- pressure
- low
- gear pump
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- 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
- 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
-
- 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
- F04C2240/20—Rotors
-
- 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
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/12—Vibration
- F04C2270/125—Controlled or regulated
-
- 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
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/13—Noise
- F04C2270/135—Controlled or regulated
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 discloses a two-stage internal gear pump. The two-stage internal gear pump comprises an outer rotor, a middle rotor and an inner rotor which are sealed through sealing components, and further comprises a high-pressure sealing block and a low-pressure sealing block; the outer rotor, the middle rotor and the inner rotor are sequentially sealed from outside to inside, the inner rotor is connected with power input equipment, the high-pressure sealing block and the corresponding sealing component separate the inner rotor and the middle rotor into a closed second-stage low-pressure area and a closed second-stage high-pressure area, and the low-pressure sealing block and the corresponding sealing component separate the middle rotor and the outer rotor into a closed first-stage low-pressure area and a closed first-stage high-pressure area; and the first-stage low-pressure area is communicated with a liquid inlet, the second-stage high-pressure area is communicated with a liquid outlet, and the second-stage low-pressure area is communicated with the first-stage high-pressure area. Compared with a common gear pump, the two-stage internal gear pump has the function of secondary pressurizing, the higher liquid pumping pressure and working efficiency can be achieved, and the working requirement of a high pressure hydraulic system is met.
Description
Technical field
The present invention relates to the liquid pumping device of a kind of high-pressure hydraulic, particularly relate in a kind of twin-stage with two-step supercharging
Intermeshing gear pump.
Technical background
Hydraulic drive is as an importance of modern hydraulic technology, and its application is quite varied.In hydraulic drive
In system, the mechanical energy that dynamic power machine is exported by hydraulic pump, it is converted into the pressure energy of working fluid, the hydraulic pressure in drive system is held
Luggage is put, and completes every output action.Hydraulic pump is the power source of hydraulic system, if not having the energy of hydraulic pump to convert link,
Then executive component will be unable to work.At present in various hydraulic pumps, due to crescent gear pump have stable working, noise low,
The plurality of advantages such as pocketed oil amount is little, compact conformation volume is little, and it is widely used in lathe, aviation, boats and ships and various engineering machine
In tool.
Pressure rating raising is the development mark of gear pump, and the operating pressure of external gear rotary pump is at below 10MPa in early days,
It is only applicable to low-pressure system, and high-pressure trend is the development trend of current hydraulic system, be also the problem that must solve of gear pump.Logical
Crossing the development of nearly 30 years, gear pump progressively strengthens at technical elements such as processing technique, the strength of materials and reliabilities.China exists
In the key technology of high-pressure gear pump and abroad a certain distance, high-end high-pressure large-displacement pump is still had to also rely on the world at present
Import, seriously constrains technological innovation and the development of hydraulic pump enterprise of domestic high-pressure gear pump.
By the development of nearly 30 years, gear pump was at technical elements such as processing technique, the strength of materials and reliabilities progressively
Strengthen, the especially appearance of backlash compensation technology, make the pressure rating of crescent gear pump improve to more than 25MPa, in reaching
The application requirement of pressure industry.But, due to self structure and the restriction of working mechanism, current gear pump still cannot meet high pressure
The job requirement of hydraulic system 35MPa.
Summary of the invention
The present invention is aiming at the deficiencies in the prior art, it is provided that a kind of compact conformation, lightweight, there is secondary booster merit
The twin-stage crescent gear pump of energy.
To achieve these goals, the twin-stage crescent gear pump designed by the present invention, its be characterized in that include by
Outer rotor, center roller and the internal rotor that containment member is closed, also includes high press seal block and low press seal block, described outer turns
Son, center roller and internal rotor ecto-entad engage successively, and described internal rotor is connected with power input equipment, described high press seal block
And containment member will be divided into two grades of low-pressure areas and two grades of higher-pressure regions, the described low press seal of closing between internal rotor and center roller
Block and containment member will be divided into one-level low-pressure area and the one-level higher-pressure region of closing, wherein one-level between center roller and outer rotor
Low-pressure area inlet connects, and described two grades of higher-pressure regions connect with liquid outlet, and described two grades of low-pressure areas are mutual with one-level higher-pressure region
Connection.
Further, described containment member includes pump case, front sealing plate and rear sealing plate, and described pump case is arranged on outer rotor
Periphery, described front sealing plate and rear sealing plate are separately positioned on pump case both sides, are additionally provided with front end outside described front sealing plate
Lid, described rear sealing plate is outside equipped with rear end cap.Form a supercharging working space with stabilized seal function.
Further, described internal rotor being provided with rotating shaft, described rotating shaft is arranged on front sealing by the bearing at two ends
On plate and rear sealing plate, and the input of described rotating shaft passes from drive end bearing bracket and is connected with power input equipment.Increasing for gear pump
Pressure operation provides power.
Yet further, on described front sealing plate, it is respectively arranged with one-level inlet, one-level liquid outlet and two grades of inlets,
Described one-level liquid outlet and two grades of inlets are by the flow passage on front sealing plate, and wherein said one-level inlet is low with one-level
Nip connects, and one-level liquid outlet connects with one-level higher-pressure region, two grades of inlets and two grades of low-pressure area connections, and described drive end bearing bracket sets
It is equipped with the pump intake corresponding with one-level inlet, is provided with two grades connected with two grades of higher-pressure regions on described rear sealing plate and goes out liquid
Mouthful, described back shroud is provided with the pump discharge corresponding with two grades of liquid outlets.Yet further, described low press seal block is by low press seal
Block pin is fixed on before and after side and obtains on front sealing plate and rear sealing plate, and described high press seal block is fixed on before and after side by high press seal block pin and obtains
On front sealing plate and rear sealing plate.Yet further, described outer turning is provided with bradyseism roller, described bradyseism roller between pump case
Installation tangent with outer rotor.While reducing outer rotor running resistance, moreover it is possible to vibration during buffering gear teeth meshing and impact.
Yet further, described bradyseism roller is uniform along outer rotor circumference, and quantity is 4-16.Yet further, described
The axis of the slow roller that shakes is metal, outer layer covers polyurethane, nylon, fluorubber or fluoroplastics.The use of bradyseism rotor can be improved
Life and reliability.Yet further, described center roller both sides end face is provided with annular ridge, described front sealing plate and after
The ring channel structures coordinated with annular ridge is all had, it is achieved operating on low voltage chamber and the packing of high-pressure working chamber on sealing plate.Prevent
The liquid of high pressure chest is revealed to low pressure chamber, realizes the fixing of center roller simultaneously.
It is an advantage of the current invention that:
1, compared with common gear pump, twin-stage crescent gear pump has the function of secondary booster, can reach higher pump liquid
Pressure and work efficiency, meet the job requirement of high-pressure hydraulic.
2, compared with multi-stage gear series connection of pumps or parallel connection, the volume of twin-stage crescent gear pump is less, weight is lighter, structure
Compacter, and the fluid leakage problem being not related in transmitting procedure.
3, by the way of secondary booster, step up the pump hydraulic coupling of gear pump, can effectively reduce higher-pressure region at different levels with
Pressure differential between low-pressure area, improves gap leakage problem.
4, the bradyseism roller that elastic abrasion-proof material makes is installed, mechanical vibration and the impact tool of gear teeth meshing to rotor
There is cushioning effect, can effectively reduce the noise of gear pump, improve run stability.
Accompanying drawing explanation
Fig. 1 is the end view of a kind of twin-stage crescent gear pump internal structure.
Fig. 2 is the decomposing schematic representation of the present invention.
Fig. 3 is the general view of internal structure of the present invention.
Fig. 4 is front sealing plate structure schematic diagram.
Fig. 5 is the rearview of Fig. 4.
Sealing plate structure schematic diagram behind Fig. 6 position.
Fig. 7 is Fig. 6 rearview.
In figure: M. containment member, 1. drive end bearing bracket, 2. before sealing plate, 3. pump case, 4. after sealing plate, 5. rear end cap, 6. bradyseism
Roller, 7. outer rotor, 8. center roller, 9. internal rotor, the highest press seal block, 11. low press seal blocks, 12,13. envelope block pins, 14 turns
Axle, 15. bearings, 16. pump intakes, 17. one-level inlets, 18. one-level liquid outlets, 19. 2 grades of inlets, 20. 2 grades of liquid outlets,
21. pump discharges, 22. one-level higher-pressure regions, 23. one-level low-pressure areas, 24. 2 grades of low-pressure areas, 25. 2 grades of higher-pressure regions, 26. cannelures,
27. fins.
Detailed description of the invention
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings:
Twin-stage crescent gear pump shown in figure, including the outer rotor 7 being closed by containment member M, center roller 8 and interior
Rotor 9, also includes that high press seal block 10 and low press seal block 11, outer rotor 7, center roller 8 and internal rotor 9 ecto-entad are nibbled successively
Closing, internal rotor 9 is connected with power input equipment, described high press seal block 10 and containment member M by internal rotor 9 and center roller 8 it
Between be divided into two grades of low-pressure areas 24 of closing and two grades of higher-pressure regions 25, described low press seal block 11 with containment member M by center roller 8
And it is divided into one-level low-pressure area 23 and the one-level higher-pressure region 22 of closing, wherein one-level low-pressure area 23 and inlet between outer rotor 7
Connection, two grades of higher-pressure regions 25 connect with liquid outlet, and described two grades of low-pressure areas 24 are interconnected with one-level higher-pressure region 22.
Wherein, containment member M includes that pump case 3, front sealing plate 2 and rear sealing plate 4, described pump case 3 are arranged on outer rotor 7 circle
Outside week, front sealing plate 2 and rear sealing plate 4 are separately positioned on pump case 3 both sides, are additionally provided with drive end bearing bracket outside described front sealing plate 2
1, rear sealing plate 4 is outside equipped with rear end cap 5, pump case 3 and front sealing plate 2, drive end bearing bracket 1, rear sealing plate 4, rear end cap 5 and is collectively forming
One supercharging working space with stabilized seal function.Rotating shaft 14 it is provided with, the rotating shaft bearing 15 by two ends on internal rotor 9
It is arranged on front sealing plate 2 and rear sealing plate 4, and the input of described rotating shaft 14 passes and power input equipment from drive end bearing bracket 1
Connecting, the supercharging operation for gear pump provides power.One-level inlet 17, one-level liquid outlet it is respectively arranged with on front sealing plate 2
18 and two grades of inlets 19, described one-level liquid outlet 18 and two grades of inlets 19 by the flow passage on front sealing plate 2, its
In, described one-level inlet 17 connects with one-level low-pressure area 23, and one-level liquid outlet 18 connects with one-level higher-pressure region 22, two grades of feed liquors
Mouthfuls 19 connect with two grades of low-pressure areas 24, and described drive end bearing bracket 1 is provided with the pump intake 16 corresponding with one-level inlet 17, described after
It is provided with the two grades of liquid outlets 20 connected with two grades of higher-pressure regions 25 on sealing plate 4, described back shroud 5 is provided with and goes out liquid with two grades
The pump discharge 21 of mouth 20 correspondences.Low press seal block 11 is fixed on front sealing plate 2 and the rear sealing plate 4 at two ends by low press seal block pin 13
On, described high press seal block 10 is fixed on front sealing plate 2 and the rear sealing plate 4 at two ends by high press seal block pin 12.
Bradyseism roller 6, described bradyseism roller 6 and the tangent installation of outer rotor 7 it is provided with between outer rotor 7 and pump case 3.Bradyseism
Roller 6 is while reducing outer rotor 7 running resistance, moreover it is possible to vibration during buffering gear teeth meshing and impact.Bradyseism roller 6 is along outward
Rotor 7 circumference is uniform, and the quantity of usual bradyseism roller 6 is 4-16.The axis of the slow roller 6 that shakes is metal, the poly-ammonia of outer layer covers
Ester, nylon, fluorubber or fluoroplastics, can improve service life and the reliability of bradyseism rotor.
It is provided with annular ridge 27 on the end face of center roller 8 both sides, front sealing plate 2 and rear sealing plate 4 all has and annular
The ring channel structures that fin coordinates.Realize the packing in operating on low voltage chamber and high-pressure working chamber, prevent the liquid of high pressure chest to low pressure
Chamber is revealed, and realizes the fixing of center roller simultaneously.
As shown in Figure 1, outer rotor 7 is concentric with the round cavity of pump case 3, and radial clearance distance is 0.5mm ~ 1mm.8
Bradyseism roller 6 is tangent with the outer ring of outer rotor 7, and has certain contact pressure, has gap with pump case inner surface simultaneously,
Stand-off distance is from 0.1 ~ 0.5mm.Outer rotor 7 and the outside gear teeth meshing of center roller 8, at the opposite side of its position of engagement, middle turn
The inner side gear teeth of son 8 engage with internal rotor 9.For avoiding pump housing chamber pressure excessive, the flow of first order Beng Ye mechanism should be less than
Second level Beng Ye mechanism, therefore center roller 8 nearside wheel tooth module is more than outboard wheel tooth module.
As illustrated in figs. 2-3, outer rotor 7, center roller 8 and internal rotor 9 constitute two-stage pump liquid mechanism, front sealing plate 4, after
Sealing plate 5 snugly fits into the two ends of pump case 3, makes the working chamber of twin-stage crescent gear pump close.The rotating shaft of internal rotor 9 14 liang
End is provided with bearing 15, is fixed in the dead eye of front sealing plate 2, rear sealing plate 4 outer face.High press seal block 10 and low press seal block
11 are fixed on front sealing plate 2 and rear sealing plate 4 by high press seal block pin 12, low press seal block pin 13 respectively.The axle of bradyseism roller 6
End is arranged in the axis hole on front sealing plate 2, rear sealing plate 4, and axle head and shaft bore surface are polish, and surface roughness Ra≤
0.05.Drive end bearing bracket 1 and rear end cap 5 fit tightly with front sealing plate 2, rear sealing plate 4, it is achieved the closing of the whole pump housing, wherein, front
Pump intake 16 on sealing plate 2 connects with one-level inlet 17, and pump discharge 21 and two grades of liquid outlets 20 on rear sealing plate 4 connect
Logical.The power intake of internal rotor 9 rotating shaft stretches out from the axis hole in the middle of drive end bearing bracket 1, and is connected with power input arrangement.
As shown in accompanying drawing 4-5, the ring channel structures being positioned at front sealing plate 2 and rear sealing plate 4 the inner is polish, and surface is thick
Rugosity≤0.05, ring channel structures is concrete such as sealing plate intermediate annular groove structure 26 before Fig. 4.The annular ridge of center roller 8 end face
27 with ring channel structures 26 be matched in clearance, annular ridge 27 also be polish, surface roughness≤0.05, carry out surface simultaneously
Cure process.
Claims (9)
1. a twin-stage crescent gear pump, it is characterised in that: the outer rotor (7) that includes being closed by containment member (M), in
Between rotor (8) and internal rotor (9), also include high press seal block (10) and low press seal block (11), described outer rotor (7), center roller
(8) engaging successively with internal rotor (9) ecto-entad, described internal rotor (9) is connected with power input equipment, described high press seal block
And containment member (M) will be divided into two grades of low-pressure areas (24) of closing and two grades between internal rotor (9) and center roller (8) (10)
Higher-pressure region (25), described low press seal block (11) and containment member (M) will be divided into envelope between center roller (8) and outer rotor (7)
The one-level low-pressure area (23) closed and one-level higher-pressure region (22), wherein one-level low-pressure area (23) connects with inlet, described two grades high
Nip (25) connects with liquid outlet, and described two grades of low-pressure areas (24) are interconnected with one-level higher-pressure region (22).
Twin-stage crescent gear pump the most according to claim 1, it is characterised in that: described containment member (M) includes pump case
(3), front sealing plate (2) and rear sealing plate (4), described pump case (3) is arranged on outer rotor (7) periphery, described front sealing plate
And rear sealing plate (4) is separately positioned on pump case (3) both sides (2), drive end bearing bracket (1) outside described front sealing plate (2), it is additionally provided with, described
Rear sealing plate (4) is outside equipped with rear end cap (5).
Twin-stage crescent gear pump the most according to claim 2, it is characterised in that: it is provided with on described internal rotor (9) and turns
Axle (14), described rotating shaft is arranged on front sealing plate (2) and rear sealing plate (4) by the bearing (15) at two ends, and described rotating shaft
(14) input passes from drive end bearing bracket (1) and is connected with power input equipment.
Twin-stage crescent gear pump the most according to claim 3, it is characterised in that: set respectively on described front sealing plate (2)
It is equipped with one-level inlet (17), one-level liquid outlet (18) and two grades of inlets (19), described one-level liquid outlet (18) and two grading
Liquid mouth (19) is by the flow passage on front sealing plate (2), and wherein, described one-level inlet (17) is with one-level low-pressure area (23) even
Logical, one-level liquid outlet (18) connects with one-level higher-pressure region (22), and two grades of inlets (19) connect with two grades of low-pressure areas (24), described
It is provided with the pump intake (16) corresponding with one-level inlet (17) on drive end bearing bracket (1), described rear sealing plate (4) is provided with and two
Two grades of liquid outlets (20) that level higher-pressure region (25) connects, described back shroud (5) are provided with corresponding with two grades of liquid outlets (20)
Pump discharge (21).
Twin-stage crescent gear pump the most according to claim 4, it is characterised in that: described low press seal block (11) is by low press seal
Block pin (13) is fixed on front sealing plate (2) and the rear sealing plate (4) at two ends, and described high press seal block (10) is by high press seal block pin
(12) it is fixed on front sealing plate (2) and the rear sealing plate (4) at two ends.
Twin-stage crescent gear pump the most according to claim 5, it is characterised in that: described outer rotor (7) and pump case (3) it
Between be provided with bradyseism roller (6), described bradyseism roller (6) and outer rotor (7) tangent installation.
Twin-stage crescent gear pump the most according to claim 6, it is characterised in that: described bradyseism roller (6) is along outer rotor
(7) circumference is uniform, and quantity is 4-16.
Twin-stage crescent gear pump the most according to claim 7, it is characterised in that: the axis of the described slow roller (6) that shakes is
Metal, outer layer covers polyurethane, nylon, fluorubber or fluoroplastics.
Twin-stage crescent gear pump the most according to claim 8, it is characterised in that: described center roller (8) both sides end face
On be provided with on annular ridge (27), described front sealing plate (2) and rear sealing plate (4) and all have the cannelure coordinated with annular ridge
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610866443.8A CN106321422A (en) | 2016-09-29 | 2016-09-29 | Two-stage internal gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610866443.8A CN106321422A (en) | 2016-09-29 | 2016-09-29 | Two-stage internal gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106321422A true CN106321422A (en) | 2017-01-11 |
Family
ID=57820620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610866443.8A Pending CN106321422A (en) | 2016-09-29 | 2016-09-29 | Two-stage internal gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106321422A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109899283A (en) * | 2019-04-10 | 2019-06-18 | 广东乐创电器有限公司 | Vehicle deceleration positioning column and the crescent gear pump with check-valves are killed built in a kind of |
| CN109944792A (en) * | 2019-04-30 | 2019-06-28 | 哈尔滨理工大学 | A kind of double pressure double-direction gearpumps |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10159147A1 (en) * | 2001-12-01 | 2003-06-18 | Zahnradfabrik Friedrichshafen | Hydraulic gear pump has pump stages in one plane, one above other radially |
| WO2006033499A1 (en) * | 2004-09-25 | 2006-03-30 | Lg Electronics Inc. | Internal gear compression unit and compressor having the same |
| CN1851269A (en) * | 2006-05-16 | 2006-10-25 | 彭利 | Slider type hydraulic device |
| US20130236345A1 (en) * | 2012-03-07 | 2013-09-12 | Gobee KIM | Compressor unit including gear rotor and compressor system using the same |
| DE102012210731A1 (en) * | 2012-06-25 | 2014-01-02 | Robert Bosch Gmbh | Double internal gear pump |
| CN104454511A (en) * | 2014-11-13 | 2015-03-25 | 福州大学 | Internally-engaged gear pump applicable to high pressure and large flow |
-
2016
- 2016-09-29 CN CN201610866443.8A patent/CN106321422A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10159147A1 (en) * | 2001-12-01 | 2003-06-18 | Zahnradfabrik Friedrichshafen | Hydraulic gear pump has pump stages in one plane, one above other radially |
| WO2006033499A1 (en) * | 2004-09-25 | 2006-03-30 | Lg Electronics Inc. | Internal gear compression unit and compressor having the same |
| CN1851269A (en) * | 2006-05-16 | 2006-10-25 | 彭利 | Slider type hydraulic device |
| US20130236345A1 (en) * | 2012-03-07 | 2013-09-12 | Gobee KIM | Compressor unit including gear rotor and compressor system using the same |
| DE102012210731A1 (en) * | 2012-06-25 | 2014-01-02 | Robert Bosch Gmbh | Double internal gear pump |
| CN104454511A (en) * | 2014-11-13 | 2015-03-25 | 福州大学 | Internally-engaged gear pump applicable to high pressure and large flow |
Non-Patent Citations (1)
| Title |
|---|
| 宋金虎: "《液压与气动技术》", 31 August 2016, 北京理工大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109899283A (en) * | 2019-04-10 | 2019-06-18 | 广东乐创电器有限公司 | Vehicle deceleration positioning column and the crescent gear pump with check-valves are killed built in a kind of |
| CN109944792A (en) * | 2019-04-30 | 2019-06-28 | 哈尔滨理工大学 | A kind of double pressure double-direction gearpumps |
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Application publication date: 20170111 |
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| WD01 | Invention patent application deemed withdrawn after publication |