CN106762907B - A kind of engineering machinery hydraulic oil return control loop and its control method - Google Patents
A kind of engineering machinery hydraulic oil return control loop and its control method Download PDFInfo
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- CN106762907B CN106762907B CN201611227379.5A CN201611227379A CN106762907B CN 106762907 B CN106762907 B CN 106762907B CN 201611227379 A CN201611227379 A CN 201611227379A CN 106762907 B CN106762907 B CN 106762907B
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- oil return
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- pressure
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
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- Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
A kind of engineering machinery hydraulic oil return control loop and its control method, including hydraulic oil container and hydraulic multichannel valve group, it is connected to by the first oil return line and the second oil return line between the hydraulic oil container and hydraulic multichannel valve group, second oil return line is equipped with counterbalance valve, first oil return line is equipped with oil return control valve, the control terminal of the oil return control valve is connect with electrically-controlled valve, the control terminal of the electrically-controlled valve is connect with control mechanism, so that the position of control mechanism control electrically-controlled valve, the control mechanism is electrically connected with the temperature-detecting device of detection hydraulic oil container temperature, the present invention realizes the control of three kinds of different pressures values on the main oil return line of hydraulic multichannel valve group, realize the demand of various working, it not only reduces energy consumption and also improves the entire thermal equilibrium state of hydraulic system.
Description
Technical field
A kind of engineering machinery hydraulic oil return control loop of present invention design and its control method.
Background technology
In construction machinery hydraulic system, the hydraulic actuator rotary motor in order to prevent especially in hydraulic crawler excavator
It is emptied, needs to increase by first counterbalance valve on hydraulic system oil return line, so as to be effectively protected rotary motor, but due to
The hypertonia of first counterbalance valve can cause the back pressure of whole system excessively high, therefore increase second counterbalance valve, to solve
Back pressure value when recirculating oil quantity is big is more than hydraulic system tolerance range, and the general 2.5bar or more of counterbalance valve setting value, real
Average working pressure has reached 4.0bar or more in the work of border, and peak value reaches 7.0bar or so, and this results in whole system pressures
Power increases, and causes the power loss being not necessarily to.
Simultaneously in excavator under winter either extremely cold weather condition, there are hydraulic oil temperature it is low increase it is preheated
Journey, simultaneously hydraulic system oil liquid return radiator still need to, by radiator heat-dissipation, also affect entire hydraulic system in this way
Wen Sheng causes unnecessary energy loss.
Invention content
The present invention solves the deficiencies in the prior art and provides three kinds of differences on a kind of main oil return line of realization hydraulic multichannel valve group
The demand of various working is realized in the control of pressure value, is not only reduced energy consumption and is also improved the entire thermal equilibrium state of hydraulic system
Engineering machinery hydraulic oil return control loop and its control method.
Following technical scheme is taken in order to achieve the above objectives：
A kind of engineering machinery hydraulic oil return control loop, including hydraulic oil container and hydraulic multichannel valve group, the hydraulic oil container
It being connected to by the first oil return line and the second oil return line between hydraulic multichannel valve group, second oil return line is equipped with counterbalance valve,
Oil return control valve and radiator are installed on first oil return line, the control terminal of the oil return control valve is connect with electrically-controlled valve,
The control terminal of the electrically-controlled valve is connect with control mechanism, and the pressure of the control mechanism and detection pilot control valve pilot pressure is examined
Device connection is surveyed, the control mechanism commutates by receiving with the data of processing pressure detection device control electrically-controlled valve.
Pilot control valve is connected with hydraulic tank by pioneer pump, and the pioneer pump is connected by electrically-controlled valve and oil return control valve
It connects.
The control mechanism is electrically connected with the temperature-detecting device of detection hydraulic oil container temperature, and the control mechanism is by connecing
Receipts and treatment temperature detection device and the data of pressure-detecting device control electrically-controlled valve commutation simultaneously.
Overflow valve is installed on the oil circuit that the pilot control valve is connected with pioneer pump, the overflow valve control pioneer pump
Hydraulic pressure.
The electrically-controlled valve is three position four-way electromagnetic valve.
The oil return control valve is three two-way valves, and the oil return resistance of the oil return control valve increases successively from left position to right position
Greatly, the oil return resistance of the left position is less than 1bar, and the middle position oil return resistance is 1bar-4bar, including 1bar and 4bar；It is described
Right position oil return resistance is 5bar-12bar, including 5bar and 12bar.
The middle position oil return resistance is 2.5bar, and the right position oil return resistance is 10bar.
The control mechanism is electrically connected with display device.
A kind of engineering machinery hydraulic method for controlling oil return, includes the following steps：
When the pressure that pressure-detecting device detects is zero or stablizes in a certain value or when changing from low to high, control mechanism
Control electrically-controlled valve be switched to right position so that the control signal in the left side of oil return control valve is connect with pioneer pump, oil return control valve by
Middle position is switched to left position, and the oil return drop in resistance of the first oil return line to minimum or is zero；
When the pressure that pressure-detecting device detects changes from high to low, control mechanism control electrically-controlled valve is restored to centre
Position so that oil return control valve both ends control signal returns hydraulic oil container, and oil return control valve is in an intermediate position, first time at this time
Oil circuit has oil return resistance；
When temperature testing organization detects that temperature is less than 20 degrees Celsius, control mechanism output signal controls automatically controlled Vavle switching
To left position so that the control signal on the right side of oil return control valve is connect with pioneer pump, and oil return control valve is switched to right position by middle position,
First oil return line oil return resistance increases.
When temperature-detecting device and pressure-detecting device act on simultaneously, control mechanism uses the signal of temperature-detecting device
Control electrically-controlled valve.
Invention increases oil return control valves, are received by control mechanism and are filled with treatment temperature detection device and pressure detecting
The data set, automatically controlling electrically-controlled valve realizes the control of hydraulic multichannel valve group oil return resistance, while ensure that rotary motor system
Not being emptied when dynamic, oil return control valve be three two-way valves realize oil return resistance it is small or be zero left position so that need not return
So that oil return control valve is in left position when oily resistance, saves energy；Oil return control valve is set to be in middle position when needing oil return resistance,
It ensure that repairing when rotary motor braking without being emptied；When entire oil temperature in hydraulic system is low or temperature declines faster, make
Oil return control valve is in right position, increases oil return resistance or prevents oil return it enters radiator, so that whole system energy stream
Turn more rationally, loss is small efficient.
Description of the drawings
Fig. 1 is the hydraulic schematic diagram of the present invention.
In attached drawing, 1, oil return control valve, 9, hydraulic motor, 10, radiator, 11, hydraulic oil container, 12, hydraulic multitandem valve
Group, 14, repairing oil circuit, 15, pioneer pump, 17, pilot control valve, 18, display device, the 20, first oil return line, 21, second
Oil return line, 25, overflow valve, 28, electrically-controlled valve, 29, control mechanism, 33, pressure-detecting device, 34, counterbalance valve, 37, temperature
Detection device.
Specific implementation mode：
The invention will be further described with embodiment below in conjunction with the accompanying drawings：
As shown in Figure 1, hydraulic multichannel valve group 12 is used to control the oil inlet and oil return of entire hydraulic system, 12 oil return of multichannel valve group is arrived
The working connection of hydraulic oil container 11 has the first oil return line 20 and the second oil return line 21, and oil return control valve is equipped on the first oil return line 20
1 with radiator 10, oil return control valve 1 is three two logical pilot operated valve devices, and left position function realizes conducting but oil return resistance is low or be approximately
Zero, middle bit function realizes conducting but has certain oil return resistance or pressure limit between 1bar-4bar, especially
2.5bar, right bit function are that cut-off or oil return resistance are very high, such as oil return resistance is less than 12bar higher than 5bar, especially
10bar.Second oil return line 21 has counterbalance valve, and the return pressure for controlling the second oil return line 21, pressure limit is in 2.5-
Between 6bar, especially 4bar or 4.5bar.Second oil return line 21 is equipped with counterbalance valve 34, parallel with the first oil return line 20, rises
Function that is dynamic while giving 12 oil return of hydraulic multichannel valve group, repairing oil circuit 14 are connect with the first oil return line 20,20 shape of the first oil return line
At back pressure give repairing oil circuit 14 to provide fluid, and be supplied to hydraulic motor 9.
Pioneer pump 15 is used to provide the pressure oil-source of pilot circuit, supplies pilot control valve 17, and with overflow valve 25 and first
The connection of control valve 17 is led, 15 hydraulic pressure of pioneer pump is controlled by overflow valve 25, pilot control valve 17 controls what rotary motor 9 acted
Pressure signal, and pressure signal obtains and is input to control mechanism 29, the horse of rotary motor 9 by the detection of pressure-detecting device 33
It is connect up to the first oil circuit 3 with the second oil circuit of motor 4, the first oil circuit of motor 3 and the oil inlet and oil return master that the second oil circuit of motor 4 is motor
Oil circuit.
Pressure-detecting device 33, temperature testing organization 37 are connect by conducting wire with control mechanism 29 and pass through data conductor biography
It is defeated by control mechanism 29, display device 18 is connect with control mechanism 29 by conducting wire, and the two data can be with transmitted in both directions, control machine
Structure 29 is connect with electrically-controlled valve 28, and the position of electrically-controlled valve is controlled by control mechanism 29.Electrically-controlled valve 28 is connect with pioneer pump 15, automatically controlled
The output pressure of valve 28 controls the both ends of oil return control valve 1 respectively, and oil return control valve 1 has three two logical functions, according to both ends
Pressure controling signal obtain different spool positions, realize the control function of three kinds of different oil return resistances.
Pilot control valve 17 acts rear-guard hydrodynamic pressure motor 9 and turns round forward or backwards, the pressure transmission of pilot control valve 17
To pressure-detecting device 33 and it is transferred to control mechanism 29, control mechanism 29 is according to the pressure change of pressure-detecting device 33 to electricity
Valve 28 is controlled to control.
When the pressure of pressure-detecting device 33 is zero, stablizes a certain value or change from low to high, control mechanism 29 exports
Signal control electrically-controlled valve 28 is located at right position, and the control signal in the left side of oil return control valve 1 is connect with pioneer pump 15 at this time, returns
Oil control valve 1 is switched to left position by middle position, and the oil return drop in resistance of the first oil return line 20 to minimum or is zero；
When the pressure of pressure-detecting device 33 changes from high to low, 29 output signal of control mechanism control electrically-controlled valve 28 makes
Its bit recovery is to centre position, and the signal of 1 both ends of oil return control valve control at this time returns hydraulic oil container, during oil return control valve 1 is in
Between position, the first oil return line 20 has certain oil return resistance, between 1bar-4bar, especially 2.5bar；
Temperature testing organization 37 is connect with control mechanism 29 by conducting wire, when the temperature of temperature testing organization 37 is less than 20 degree
When, 29 output signal of control mechanism control electrically-controlled valve 28 is in left position, at this time the control signal on the right side of oil return control valve 1 and elder generation
15 connection of pump is led, oil return control valve 1 is switched to right position by middle position, and 20 oil return resistance of the first oil return line increases, such as oil return resistance
It is less than 12bar, especially 10bar higher than 5bar.
When temperature-detecting device 17 and pressure-detecting device 33 act on simultaneously, control mechanism 29 preferentially uses temperature detection
The signal of device 17, and control electrically-controlled valve 28.
Indication mechanism 18 and the data of control mechanism 29 can be transmitted mutually, and are realized on indication mechanism 18 and shown in real time
Show, or the control model that input is different, realizes the control of 1 different location of oil return control valve.
Claims (5)
1. a kind of engineering machinery hydraulic method for controlling oil return, including engineering machinery hydraulic oil return control loop, the engineering machinery
Hydraulic oil-returning control loop includes hydraulic oil container and hydraulic multichannel valve group, is passed through between the hydraulic oil container and hydraulic multichannel valve group
First oil return line and the connection of the second oil return line, second oil return line are equipped with counterbalance valve, are equipped on first oil return line
Oil return control valve and radiator, the oil return control valve be three two-way valves, the control terminal of the oil return control valve with three four
Three-way electromagnetic valve connects, and the control terminal of the three position four-way electromagnetic valve is connect with control mechanism, the control mechanism and detection guide
The pressure-detecting device of control valve pilot pressure connects, and the control mechanism is by receiving the number with processing pressure detection device
According to control three position four-way electromagnetic valve commutation；Pilot control valve is connected with hydraulic tank by pioneer pump, and the pioneer pump passes through three
Position four-way solenoid valve is connect with oil return control valve；The control mechanism and the temperature-detecting device of detection hydraulic oil container temperature are electrically connected
It connects, the control mechanism controls 3-position 4-way simultaneously by reception and treatment temperature detection device and the data of pressure-detecting device
Solenoid valve commutates；Overflow valve is installed, the overflow valve controls guide on the oil circuit that the pilot control valve is connected with pioneer pump
The hydraulic pressure of pump, it is characterised in that：
When the pressure that pressure-detecting device detects is zero or stablizes in a certain value or when changing from low to high that control mechanism controls
Three position four-way electromagnetic valve is switched to right position so that the control signal in the left side of oil return control valve is connect with pioneer pump, oil return control
Valve is switched to left position by middle position, and the oil return drop in resistance of the first oil return line to minimum or is zero；
When the pressure that pressure-detecting device detects changes from high to low, control mechanism control three position four-way electromagnetic valve is restored to
Centre position so that oil return control valve both ends control signal returns hydraulic oil container, and oil return control valve is in an intermediate position, and at this time the
One oil return line has oil return resistance；
When temperature testing organization detects that temperature is less than 20 degrees Celsius, control mechanism output signal controls three position four-way electromagnetic valve
It is switched to left position so that the control signal on the right side of oil return control valve is connect with pioneer pump, and oil return control valve is switched to by middle position
Right position, the first oil return line oil return resistance increase.
2. engineering machinery hydraulic method for controlling oil return according to claim 1, it is characterised in that：The oil return control valve
Oil return resistance is sequentially increased from left position to right position, and the oil return resistance of the left position is less than 1bar, and the middle position oil return resistance is
1bar-4bar, including 1bar and 4bar；The right position oil return resistance is 5bar-12bar, including 5bar and 12bar.
3. engineering machinery hydraulic method for controlling oil return according to claim 2, it is characterised in that：The middle position oil return resistance
For 2.5bar, the right position oil return resistance is 10bar.
4. engineering machinery hydraulic method for controlling oil return according to claim 3, it is characterised in that：The control mechanism with it is aobvious
Showing device is electrically connected.
5. the engineering machinery hydraulic method for controlling oil return according to one of Claims 1-4, it is characterised in that：When temperature is examined
When survey device acts on simultaneously with pressure-detecting device, control mechanism controls 3-position 4-way electromagnetism using the signal of temperature-detecting device
Valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611227379.5A CN106762907B (en) | 2016-12-27 | 2016-12-27 | A kind of engineering machinery hydraulic oil return control loop and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611227379.5A CN106762907B (en) | 2016-12-27 | 2016-12-27 | A kind of engineering machinery hydraulic oil return control loop and its control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106762907A CN106762907A (en) | 2017-05-31 |
| CN106762907B true CN106762907B (en) | 2018-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611227379.5A Active CN106762907B (en) | 2016-12-27 | 2016-12-27 | A kind of engineering machinery hydraulic oil return control loop and its control method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117450126B (en) * | 2023-12-20 | 2024-03-15 | 中联重科土方机械有限公司 | Hydraulic system, oil return control method and related equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001041204A (en) * | 1999-07-27 | 2001-02-13 | Sumitomo Constr Mach Co Ltd | Hydraulic circuit |
| JP2003120603A (en) * | 2001-10-16 | 2003-04-23 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Hydraulic circuit for construction machine |
| JP2004263749A (en) * | 2003-02-28 | 2004-09-24 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Hydraulic circuit for remote control valve for construction machine |
| JP2006064110A (en) * | 2004-08-27 | 2006-03-09 | Komatsu Ltd | Hydraulic circuit of construction equipment |
| JP2008267490A (en) * | 2007-04-20 | 2008-11-06 | Komatsu Ltd | Warm-up device for construction machine |
| CN105386485A (en) * | 2015-12-03 | 2016-03-09 | 山河智能装备股份有限公司 | Hydraulic energy-saving control loop and control method of excavator |
| CN206290518U (en) * | 2016-12-27 | 2017-06-30 | 山河智能装备股份有限公司 | A kind of engineering machinery hydraulic oil return control loop |
-
2016
- 2016-12-27 CN CN201611227379.5A patent/CN106762907B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001041204A (en) * | 1999-07-27 | 2001-02-13 | Sumitomo Constr Mach Co Ltd | Hydraulic circuit |
| JP2003120603A (en) * | 2001-10-16 | 2003-04-23 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Hydraulic circuit for construction machine |
| JP2004263749A (en) * | 2003-02-28 | 2004-09-24 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Hydraulic circuit for remote control valve for construction machine |
| JP2006064110A (en) * | 2004-08-27 | 2006-03-09 | Komatsu Ltd | Hydraulic circuit of construction equipment |
| JP2008267490A (en) * | 2007-04-20 | 2008-11-06 | Komatsu Ltd | Warm-up device for construction machine |
| CN105386485A (en) * | 2015-12-03 | 2016-03-09 | 山河智能装备股份有限公司 | Hydraulic energy-saving control loop and control method of excavator |
| CN206290518U (en) * | 2016-12-27 | 2017-06-30 | 山河智能装备股份有限公司 | A kind of engineering machinery hydraulic oil return control loop |
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| CN106762907A (en) | 2017-05-31 |
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Effective date of registration: 20220105 Address after: 017000 equipment manufacturing base in Dongsheng District, Ordos City, Inner Mongolia Autonomous Region Patentee after: Inner Mongolia Shanhe juding Mining Machinery Manufacturing Co.,Ltd. Address before: 410100 Shanhe intelligent industrial park, No. 16, Lixiang Middle Road, Changsha Economic and Technological Development Zone, Changsha City, Hunan Province Patentee before: Sunward Intelligent Equipment Co.,Ltd. |