CN105113570A - Configuration of hydraulic element of excavator - Google Patents
Configuration of hydraulic element of excavator Download PDFInfo
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- CN105113570A CN105113570A CN201510503296.3A CN201510503296A CN105113570A CN 105113570 A CN105113570 A CN 105113570A CN 201510503296 A CN201510503296 A CN 201510503296A CN 105113570 A CN105113570 A CN 105113570A
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- excavator
- control valve
- rotary motor
- main control
- hydraulic elements
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- 230000004907 flux Effects 0.000 claims description 8
- 230000009977 dual effect Effects 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 8
- 238000007789 sealing Methods 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 20
- 239000010720 hydraulic oil Substances 0.000 description 4
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000003292 diminished effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000013642 negative control Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses configuration of a hydraulic element of an excavator. The configuration comprises a main pump, a rotary motor and a main control valve. The main pump is connected with an engine through a spline of a main shaft. The main pump is connected with the main control valve through a hydraulic pipeline. A work oil opening of the main control valve is connected with large cavities and small cavities of all oil cylinder openings of the excavator and oil inlet and return openings of the rotary motor and a walking motor, and the rotary motor is a double rotary motor. The double rotary motor is adopted, displacement and starting torque are large, and when the excavator rotates, time consumed from a static state to a constant speed state is short, and work efficiency is greatly improved. Meanwhile, the contact area of the double rotary motor and a gear ring of the excavator is large, the borne unit area is small, and the service life of the excavator can be greatly prolonged. Internal oil channel design is optimized, the sealing mode of a one-way valve and the like is changed, so that the leakage amount becomes small, and energy waste is reduced.
Description
Technical field
The invention belongs to engineering machinery hydraulic transmission field, especially a kind of excavator Hydraulic Elements configuration.
Background technology
Hydraulic crawler excavator is a kind of widely used engineering machinery, is widely used in engineering construction.Hydraulic Elements are the key points affecting excavator performance with mating of complete machine, comprise the operability of action, efficiency and oil consumption etc., but in existing hydraulic system configuration, in the excavator of same tonnage, pump delivery is less, effectively can not play the power of motor in real work, cause efficiency partially slow; Rotary motor mostly also is single motor and drives, make the starting torque of excavator less than normal, thus cause speed when starting slower, and stop deviation angle during braking larger, the area that single rotary reducer engages with excavator gear ring is little causes the life-span short, is unfavorable for the accurate operation of excavator and the raising of efficiency.In addition, hydraulic pressure master control valve core diameter is less, and metered flow is little, and the pressure loss is large, and simultaneously because the design of internal galleries is unreasonable, leakage rate is bigger than normal, result in the waste of the energy.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of excavator Hydraulic Elements to configure, such that the starting torque of excavator is large, toggle speed is fast, engine efficiency is higher, can improve the accurate operation of excavator and operating efficiency.
For achieving the above object, the technical solution used in the present invention is: a kind of excavator Hydraulic Elements configuration, comprise main pump, rotary motor and main control valve, described main pump is connected with motor by the spline of main shaft, main pump is connected by fluid pressure line with main control valve, the actuator port of described main control valve is connected with the oil inlet and oil return mouth of running motor with the large loculus of each cylinder ports of excavator, rotary motor, and described rotary motor is dual AC power motor.
Described main control valve and the oil circuit between rotary motor and running motor are provided with minus flow feedback valve, and described minus flow feedback valve is provided with throttle orifice, for generation of inverted flux control signal.
Described main pump delivery is 200ml/r, for providing working oil.
Described main control valve is inverted flux control valve., valve core diameter is 34mm, and metered flow is 360L/min, and rated pressure is 330bar, and secondary oil pressure relief is 360bar.
Described Hydraulic Elements configuration also comprises gear pump, and described gear pump is connected with the main shaft of main valve by spline, and gear pump delivery is 15ml/r, for providing pilot control.
The invention has the beneficial effects as follows: main pump delivery is 200ml/r, the excavator discharge of main pump used of common same tonnage is little, be that the power curve of 200ml/r pump is adjusted to consistent with small displacement pump by discharge capacity, when excavator power used is less, the responsivenesses such as now pump is in larger flow, dipper recovery accelerate; When excavator power demand is larger, it is consistent with small displacement pump power, there will not be motor to fall speed or flame-out phenomenon.Rotary motor employing discharge capacity is the dual AC power motor of 170ml/r, and because double motor discharge capacity is comparatively large, so its starting torque is large, excavator, when turning round, by static short to the time at the uniform velocity used, substantially increases operating efficiency; Meanwhile, greatly, the unit area of bearing is less, greatly can extend the application life of excavator for dual AC power motor and excavator gear ring contact area.The valve core diameter of main valve is 34mm, and metered flow is 360L/min, optimizes internal galleries design, have changed the sealing means such as one way valve, leakage rate is diminished, decreases energy dissipation.
Excavator have employed dipper regeneration function, when dipper reclaims, due to the reason of equipment deadweight, the return pressure of its dipper is higher, if hydraulic oil is directly back to mailbox, just makes this part energy dissipation fall, and too increase the load of heat radiation, increase regeneration function, the section hydraulic of oil return oil can be incorporated into the oil-in of main valve, the speed that dipper reclaims can be greatly reduced; Swing arm interflow, dipper interflow and scraper bowl interflow, reasonably, maximum effect make use of engine power, improve the operating efficiency of excavator.
Accompanying drawing explanation
Fig. 1 is fundamental diagram of the present invention.
In figure: 1-rotary motor, 2-minus flow feedback valve, 3-main control valve, 4-motor, 5-main pump, 6-gear pump.
Detailed description of the invention
Below in conjunction with the drawings and the specific embodiments, the present invention is further illustrated.
A kind of excavator Hydraulic Elements configuration, comprise main pump 5, rotary motor 1 and main control valve 3, described main pump 5 is connected with motor 4 by the spline of main shaft, main pump 5 is connected by fluid pressure line with main control valve 3, the actuator port of described main control valve 3 is connected with the oil inlet and oil return mouth of running motor with the large loculus of each cylinder ports of excavator, rotary motor 1, and described rotary motor 1 is dual AC power motor.Described main pump 5 provides working oil for negative control pumps in series, and discharge capacity is 200ml/r; Rotary motor 1 is fixed displacement double motor discharge capacity is 170ml/r; Described main control valve 3 is inverted flux control valve, and spool latus rectum is 34mm, and metered flow is 360L/min, and rated pressure is 330bar, and secondary oil pressure relief is 360bar; The discharge capacity of gear pump 6 is 15ml/r, for providing pilot control.
Described main control valve 3 and the oil circuit between rotary motor 1 and running motor are provided with minus flow feedback valve 2, and described minus flow feedback valve 2 is provided with throttle orifice, for generation of inverted flux control signal.
The discharge capacity of main pump 5 is 200ml/r, the excavator discharge of main pump used of common same tonnage is little, is that the power curve of 200ml/r pump is adjusted to consistent with small displacement pump, when excavator power used is less by discharge capacity, the responsivenesses such as now pump is in larger flow, dipper recovery accelerate; When excavator power demand is larger, it is consistent with small displacement pump power, there will not be motor to fall speed or flame-out phenomenon.Rotary motor 1 adopts discharge capacity to be the dual AC power motor of 170ml/r, and because double motor discharge capacity is comparatively large, so its starting torque is large, excavator, when turning round, by static short to the time at the uniform velocity used, substantially increases operating efficiency; Meanwhile, greatly, the unit area of bearing is less, greatly can extend the application life of excavator for dual AC power motor and excavator gear ring contact area.The valve core diameter of main valve is 34mm, and metered flow is 360L/min, optimizes internal galleries design, have changed the sealing means such as one way valve, leakage rate is diminished, decreases energy dissipation.
In addition, excavator have employed dipper regeneration function, and part oil return when being reclaimed by dipper regenerates oil-feed, can greatly reduce the speed that dipper reclaims; Swing arm interflow, dipper interflow and scraper bowl interflow, reasonably, maximum effect make use of engine power, improve the operating efficiency of excavator.
As shown in the figure: when the spool of main control valve 3 is in meta: main pump 5 rotates under the drive of motor 4, main control valve 3 is opened, the hydraulic oil that main pump 5 provides enters the minus flow feedback valve 2 of main control valve 3 through the meta oil circuit of main control valve 3, there is throttle orifice in minus flow feedback valve 2, can pressure controling signal be produced, pressure signal be passed to the discharge capacity governor motion of main pump 5, make pump variable, now pressure is large, will promote main pump 5 and change to small displacement.When pressure is more than 32bar, overflow valve is opened, and now main pump 5 receives inverted flux control signal, works together to main pump 5 discharge capacity governor motion with gear pump 6 oil, maintains the flow that main pump 5 exports 30L/min.
When spool commutates, as rotary valve key commutation, the meta oil circuit of main control valve 3 is cut off, now the controlled pressure of minus flow feedback valve 2 is low, the swash plate of main pump 5 is changed to big swing angle by little pivot angle, and the hydraulic oil provided increases, and working oil enters rotary motor 1, drive rotary motor 1 forward or reverse, actual act.
During the spool action of main control valve 3: gear pump 6 provides hydraulic oil, when pilot control oil obtains signal, promote spool action, meta will be closed, and now inverted flux control signal from large to small, and the working oil path of main control valve 3 is connected, pump is changed to huge discharge by small displacement, realizes equipment action.
Main pump power limitation control: when main pump 5 power reaches invariable power, if load increases, now the power spool of main pump 5 regulates to the discharge capacity of main pump 5, makes the power invariability of main pump 5, prevents excavator and falls speed or flame-out phenomenon.
The foregoing is only preferred embodiment of the present invention, is not limitation of the present invention.The change that those of ordinary skill in the art makes in essential scope of the present invention, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (8)
1. an excavator Hydraulic Elements configuration, comprise main pump, rotary motor and main control valve, it is characterized in that: described main pump is connected with motor, main pump is connected by fluid pressure line with main control valve, the actuator port of described main control valve is connected with the oil inlet and oil return mouth of running motor with the large loculus of each cylinder ports of excavator, rotary motor, and described rotary motor is dual AC power motor.
2. excavator Hydraulic Elements configuration according to claim 1, is characterized in that: the minus flow feedback valve adjustable main pump discharge size in described main control valve.
3. excavator Hydraulic Elements configuration according to claim 2, is characterized in that: described minus flow feedback valve is provided with throttle orifice, for generation of inverted flux control signal.
4. excavator Hydraulic Elements configuration according to claim 1, is characterized in that: described main pump delivery is 200ml/r, for providing working oil.
5. excavator Hydraulic Elements configuration according to claim 1, is characterized in that: described main control valve is inverted flux control valve..
6. excavator Hydraulic Elements configuration according to claim 5, is characterized in that: the valve core diameter of described main control valve is 34mm, and metered flow is 360L/min, and rated pressure is 330bar, and secondary oil pressure relief is 360bar.
7. the excavator Hydraulic Elements configuration according to any one of claim 1 to 6, is characterized in that: described Hydraulic Elements configuration also comprises gear pump, and described gear pump is connected with the main shaft of main valve by spline, for providing pilot control.
8. excavator Hydraulic Elements configuration according to claim 7, is characterized in that: described gear pump delivery is 15ml/r.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510503296.3A CN105113570A (en) | 2015-08-17 | 2015-08-17 | Configuration of hydraulic element of excavator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510503296.3A CN105113570A (en) | 2015-08-17 | 2015-08-17 | Configuration of hydraulic element of excavator |
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| CN105113570A true CN105113570A (en) | 2015-12-02 |
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| CN201510503296.3A Pending CN105113570A (en) | 2015-08-17 | 2015-08-17 | Configuration of hydraulic element of excavator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11280357B1 (en) | 2018-12-26 | 2022-03-22 | Linde Hydraulics (China) Co., Ltd. | Hydraulic variable pump set and excavator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030048599A (en) * | 2001-12-12 | 2003-06-25 | 한일유압 주식회사 | Feedback apparatus of control valve having arm feedback spool in excavator |
| KR20040057486A (en) * | 2002-12-26 | 2004-07-02 | 대우종합기계 주식회사 | Method of controlling power of hydraulic pump in an excavator |
| CN201943570U (en) * | 2010-12-30 | 2011-08-24 | 北京市三一重机有限公司 | Upper-part rotation speed-limiting device for rotary drilling rig |
| JP2011226491A (en) * | 2010-04-15 | 2011-11-10 | Tadao Osuga | Turning hydraulic circuit of hydraulic shovel |
| CN202164654U (en) * | 2011-06-23 | 2012-03-14 | 徐州徐工挖掘机械有限公司 | Double-oil-way oil supplementing device of excavator rotary motor |
| CN205205906U (en) * | 2015-08-17 | 2016-05-04 | 山东常林机械集团股份有限公司 | Excavator hydraulic component system |
-
2015
- 2015-08-17 CN CN201510503296.3A patent/CN105113570A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030048599A (en) * | 2001-12-12 | 2003-06-25 | 한일유압 주식회사 | Feedback apparatus of control valve having arm feedback spool in excavator |
| KR20040057486A (en) * | 2002-12-26 | 2004-07-02 | 대우종합기계 주식회사 | Method of controlling power of hydraulic pump in an excavator |
| JP2011226491A (en) * | 2010-04-15 | 2011-11-10 | Tadao Osuga | Turning hydraulic circuit of hydraulic shovel |
| CN201943570U (en) * | 2010-12-30 | 2011-08-24 | 北京市三一重机有限公司 | Upper-part rotation speed-limiting device for rotary drilling rig |
| CN202164654U (en) * | 2011-06-23 | 2012-03-14 | 徐州徐工挖掘机械有限公司 | Double-oil-way oil supplementing device of excavator rotary motor |
| CN205205906U (en) * | 2015-08-17 | 2016-05-04 | 山东常林机械集团股份有限公司 | Excavator hydraulic component system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11280357B1 (en) | 2018-12-26 | 2022-03-22 | Linde Hydraulics (China) Co., Ltd. | Hydraulic variable pump set and excavator |
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