CN104265707A - Duplex gear pump open type hydraulic system of concrete mixer - Google Patents
Duplex gear pump open type hydraulic system of concrete mixer Download PDFInfo
- Publication number
- CN104265707A CN104265707A CN201410494776.3A CN201410494776A CN104265707A CN 104265707 A CN104265707 A CN 104265707A CN 201410494776 A CN201410494776 A CN 201410494776A CN 104265707 A CN104265707 A CN 104265707A
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- Prior art keywords
- duplex
- pump
- reversing valve
- open type
- hydraulic system
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a duplex gear pump open type hydraulic system of a concrete mixer. The duplex gear pump open type hydraulic system comprises a duplex pump, a reversing valve and a cycloidal gear motor, wherein the duplex pump comprises a small duplex pump and a large duplex pump; the oil suction opening of the duplex pump is connected with a hydraulic oil tank; the reversing valve comprises an electromagnetic reversing valve and an electro-hydraulic reversing valve; the oil outlet of the small duplex pump is communicated with the cycloidal gear motor by use of the electromagnetic reversing valve, while the oil outlet of the large duplex pump is communicated with the cycloidal gear motor by use of the electro-hydraulic reversing valve. The reversing valve also can be a hand-operated reversing valve; the oil suction opening of the duplex pump is connected with the hydraulic oil tank, and the oil outlets of the small duplex pump and the large duplex pump are communicated with the cycloidal gear motor by use of the hand-operated reversing valve. With the duplex gear pump and the cycloidal gear motor, the duplex gear pump open type hydraulic system of the concrete mixer is simple in structure, low in price, relatively low in requirement on the oil cleanness, and not easy to damage; meanwhile, the problem that the rotating speed of a tank body fails in meeting the use requirement if a single gear pump open type hydraulic system is adopted at present.
Description
Technical field
The invention belongs to hydraulic system, be specifically related to a kind of concrete mixer duplex gear pump open type hydraulic system.
Background technique
Concrete mixing and transporting car is used to the special-purpose vehicle transporting commerical ready-mixed concrete, for agitating lorry tank body provides the hydraulic system of power to be the of paramount importance part of transit mixer.Current domestic and international all transit mixer great majority all use plunger pump closed type hydraulic system, the many complex structures of closed system hydraulic element, and transit mixer great majority are all from this system of external import, expensive.Applying high voltage plunger pump and axial piston motor simultaneously, requires higher to oil cleanliness.In use, execution conditions are poor, and fluid easily pollutes, therefore easily break down.Small-sized transit mixer useful monodentate wheel pump open type hydraulic system, although this hydraulic system is simple, tank body speed range is narrower.Because rotating speed of automobile engine is generally at 600r/min--2000r/min, gear ratio is 3.33, so agitator tank rotating speed gear ratio also should be about 3.33.But stir within the scope of the positive and negative 1.5r/min--16r/min of tank body rotation speed requirements, such gear ratio is 16/1.5=10.66, so select which type of pump all cannot reach the requirement of transit mixer to tank body rotating speed at present.
Summary of the invention
In order to overcome the above-mentioned defect that prior art field exists, the object of the invention is to, a kind of concrete mixer duplex gear pump open type hydraulic system is provided, solve closed type hydraulic system complex structure, pump, motor rapid wear, problem simultaneously on the high side; Solve monodentate wheel pump open type hydraulic system tank body turn up less than the problem required simultaneously.
Concrete mixer duplex gear pump open type hydraulic system provided by the invention, it comprises duplex pump, selector valve and cycloidal gear motor, and wherein, described duplex pump comprises the little pump of duplex and the large pump of duplex, and duplex pump inlet port is connected with hydraulic oil container; Described selector valve comprises solenoid directional control valve and electro-hydraulic reversing valve, and the little hydraulic fluid port that pumps of duplex is connected by solenoid directional control valve and cycloidal gear motor, and duplex is pumped greatly hydraulic fluid port and connected by electro-hydraulic reversing valve and cycloidal gear motor.Selector valve also can adopt hand-operated direction valve, and described duplex pump inlet port is connected with hydraulic oil container, and the oil outlet of the little pump of duplex, the large pump of duplex manually connect by selector valve and cycloidal gear motor.Duplex pump is connected with relief valve; The little pump of duplex and the large pump of duplex are gear pump.
Concrete mixer duplex gear pump open type hydraulic system provided by the invention, its beneficial effect is, adopt duplex geared pump and cycloidal gear motor, system architecture is simple, cheap, require lower to oil cleanliness, not fragile, solve the problem that domestic current use monodentate wheel pump open type hydraulic system tank body rotating speed cannot reach usage requirement simultaneously.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the embodiment of the present invention one;
Fig. 2 is the overall structure schematic diagram of the embodiment of the present invention two.
Mark in figure:
1. the little pump of duplex; 2. the large pump of duplex; 3. relief valve; 4. relief valve; 5. solenoid directional control valve; 6. electro-hydraulic reversing valve; 7. cycloidal gear motor; 8. hand-operated direction valve; 9. hand-operated direction valve.
Embodiment
With reference to the accompanying drawings, in conjunction with an embodiment, concrete mixer duplex gear pump open type hydraulic system provided by the invention is described in detail.
Embodiment one
With reference to Fig. 1, the concrete mixer duplex gear pump open type hydraulic system of the present embodiment, it comprises duplex pump, solenoid directional control valve 5, electro-hydraulic reversing valve 6 and cycloidal gear motor 7, wherein, described duplex pump comprises the little pump of duplex 1 and the large pump 2 of duplex, the little pump of duplex 1, duplex large pump 2 inlet port are all connected with hydraulic oil container, duplex little pump 1 oil outlet is connected by solenoid directional control valve 5 and cycloidal gear motor 7, duplex large pump 2 oil outlet is connected by electro-hydraulic reversing valve 6 and cycloidal gear motor 7, and the little pump of duplex 1 and the large pump 2 of duplex are connected to relief valve 3, relief valve 4.The little pump of duplex 1 and the large pump 2 of duplex are gear pump.
Working principle: automobile Full-power takeoff drives the little pump of duplex 1 and the large pump 2 of duplex to rotate simultaneously.If the electromagnet of solenoid directional control valve 5 and electro-hydraulic reversing valve 6 is not charged, the fluid that two oil pumps export all directly flows back to fuel tank by neutral position.When the electromagnet CT1 of solenoid directional control valve 5 is charged, duplex little pump 1 pressure oil output enters cycloidal gear motor 7 left end, is formed and rotates forward.If otherwise the electromagnet CT1 power-off of solenoid directional control valve 5, electromagnet CT2 is charged, and duplex little pump 1 pressure oil output enters cycloidal gear motor 7 right-hand member, forms reversion.
In like manner, if the electromagnet CT3 of electro-hydraulic reversing valve 6 is charged, duplex large pump 2 pressure oil output enters cycloidal gear motor 7 left end, formed and rotate forward, if otherwise the electromagnet CT3 power-off of electro-hydraulic reversing valve 6, electromagnet CT4 is charged, and duplex large pump 2 pressure oil output enters cycloidal gear motor 7 right-hand member, forms reversion.
If electromagnet CT1 and electromagnet CT3 is simultaneously charged, rotate forward faster, otherwise electromagnet CT2 and electromagnet CT4 is simultaneously charged, reverses faster.
By vehicles engine throttle, specifically different rotating speeds can be produced.Concrete data are as follows:
(1) duplex little pump 1 gather amount 25ml/r
Rotating speed of automobile engine 600r/min--2000r/min
Cycloidal gear motor 7 selects BMT200, discharge capacity 200ml/min
Retarder velocity ratio 42, the little pump 1 of duplex and cycloidal gear motor 7 efficiency are all 0.9
Then tank body speed range: 25ml/minX600r/min=15000ml/min
15000ml/min÷200ml/min÷42=1.78r/min
1.78r/minX2000/600X0.9X0.9=4.8r/min
Visible agitator tank rotating speed model scope 1.78r/min--4.8r/min
(2) duplex large pump 2 gather amount 63ml/r
Rotating speed of automobile engine 600r/min--2000r/min
Cycloidal gear motor 7 selects BMT200, discharge capacity 200ml/min
Retarder velocity ratio 42, the large pump 2 of duplex and cycloidal gear motor 7 efficiency are all 0.9
Then tank body speed range: 63ml/minX600r/min=37800ml/min
37800ml/min÷200ml/min÷42=4.5r/min
4.5r/minX2000/600X0.9X0.9=12.15r/min
Visible agitator tank rotating speed model scope 4.5r/min--12.15r/min
(3) size pump turns simultaneously: most high speed 4.8r/min+12.15r/min=16.95r/min
As can be seen here, control two pumps when rotating individually or simultaneously, the positive and negative rotating speed of tank body is within the scope of 1.78r ∕ min--16.95r ∕ min.
Embodiment two
With reference to Fig. 2, the concrete mixer duplex gear pump open type hydraulic system of the present embodiment, comprise duplex pump, hand-operated direction valve 8, hand-operated direction valve 9 and cycloidal gear motor 7, wherein, described duplex pump comprises the little pump of duplex 1 and the large pump 2 of duplex, the little pump of duplex 1, duplex large pump 2 inlet port are all connected with hydraulic oil container, duplex little pump 1 oil outlet manually selector valve 8 and cycloidal gear motor 7 is connected, duplex large pump 2 oil outlet manually selector valve 9 and cycloidal gear motor 7 is connected, and the large pump 2 of the little pump of duplex 1, duplex is connected to relief valve 3, relief valve 4.The little pump of duplex 1 and the large pump 2 of duplex are gear pump.
After adopting hand-operated direction valve 8,9, working principle is identical with embodiment one.
Claims (3)
1. a concrete mixer duplex gear pump open type hydraulic system, is characterized in that: it comprises duplex pump, selector valve and cycloidal gear motor, and wherein, described duplex pump comprises the little pump of duplex and the large pump of duplex, and duplex pump inlet port is connected with hydraulic oil container; Described selector valve comprises solenoid directional control valve and electro-hydraulic reversing valve, and the little hydraulic fluid port that pumps of duplex is connected by solenoid directional control valve and cycloidal gear motor, and duplex is pumped greatly hydraulic fluid port and connected by electro-hydraulic reversing valve and cycloidal gear motor; The little pump of duplex and the large pump of duplex are gear pump.
2. concrete mixer duplex gear pump open type hydraulic system according to claim 1, it is characterized in that: selector valve also can adopt hand-operated direction valve, described duplex pump inlet port is connected with hydraulic oil container, and the oil outlet of the little pump of duplex, the large pump of duplex manually connect by selector valve and cycloidal gear motor.
3. concrete mixer duplex gear pump open type hydraulic system according to claim 1, is characterized in that: duplex pump is connected with relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410494776.3A CN104265707A (en) | 2014-09-25 | 2014-09-25 | Duplex gear pump open type hydraulic system of concrete mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410494776.3A CN104265707A (en) | 2014-09-25 | 2014-09-25 | Duplex gear pump open type hydraulic system of concrete mixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104265707A true CN104265707A (en) | 2015-01-07 |
Family
ID=52157263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410494776.3A Pending CN104265707A (en) | 2014-09-25 | 2014-09-25 | Duplex gear pump open type hydraulic system of concrete mixer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104265707A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104842457A (en) * | 2015-05-18 | 2015-08-19 | 湖北三环专用汽车有限公司 | Open type concrete mixer control mechanism |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5490465A (en) * | 1977-12-27 | 1979-07-18 | Hitachi Constr Mach Co Ltd | Joining hydraulic circuit |
| CN201246355Y (en) * | 2008-05-24 | 2009-05-27 | 邱景发 | Hydraulic speed variator of crane |
| CN201901114U (en) * | 2010-12-21 | 2011-07-20 | 徐州海伦哲专用车辆股份有限公司 | Hydraulic control system of powered water-washing vehicle |
| CN202358778U (en) * | 2011-10-28 | 2012-08-01 | 淄博广梓机械有限公司 | Warping mechanism for transloader |
| CN102976224A (en) * | 2012-12-19 | 2013-03-20 | 中国重汽集团济南动力有限公司 | Automobile double-capstan system |
| CN204082731U (en) * | 2014-09-25 | 2015-01-07 | 中国重汽集团青岛重工有限公司 | Concrete mixer duplex gear pump open type hydraulic system |
-
2014
- 2014-09-25 CN CN201410494776.3A patent/CN104265707A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5490465A (en) * | 1977-12-27 | 1979-07-18 | Hitachi Constr Mach Co Ltd | Joining hydraulic circuit |
| CN201246355Y (en) * | 2008-05-24 | 2009-05-27 | 邱景发 | Hydraulic speed variator of crane |
| CN201901114U (en) * | 2010-12-21 | 2011-07-20 | 徐州海伦哲专用车辆股份有限公司 | Hydraulic control system of powered water-washing vehicle |
| CN202358778U (en) * | 2011-10-28 | 2012-08-01 | 淄博广梓机械有限公司 | Warping mechanism for transloader |
| CN102976224A (en) * | 2012-12-19 | 2013-03-20 | 中国重汽集团济南动力有限公司 | Automobile double-capstan system |
| CN204082731U (en) * | 2014-09-25 | 2015-01-07 | 中国重汽集团青岛重工有限公司 | Concrete mixer duplex gear pump open type hydraulic system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104842457A (en) * | 2015-05-18 | 2015-08-19 | 湖北三环专用汽车有限公司 | Open type concrete mixer control mechanism |
| CN104842457B (en) * | 2015-05-18 | 2017-03-15 | 湖北三环专用汽车有限公司 | A kind of open type concrete mixer truck controlling organization |
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| PB01 | Publication | ||
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Application publication date: 20150107 |