CN206290518U - A kind of engineering machinery hydraulic oil return control loop - Google Patents
A kind of engineering machinery hydraulic oil return control loop Download PDFInfo
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- CN206290518U CN206290518U CN201621445509.8U CN201621445509U CN206290518U CN 206290518 U CN206290518 U CN 206290518U CN 201621445509 U CN201621445509 U CN 201621445509U CN 206290518 U CN206290518 U CN 206290518U
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Abstract
A kind of engineering machinery hydraulic oil return control loop, including hydraulic oil container and hydraulic multichannel valve group, connected 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 provided with counterbalance valve, first oil return line is provided with back oil control valve, the control end of described time oil control valve is connected with electrically-controlled valve, the control end of the electrically-controlled valve is connected with controlling organization, so that controlling organization controls the position of electrically-controlled valve, the controlling organization is electrically connected with the temperature-detecting device of detection hydraulic oil container temperature, the utility model realizes three kinds of controls of different pressures value on the main oil return line of hydraulic multichannel valve group, realize the demand of various working, not only reduce energy consumption and also improve the whole thermal equilibrium state of hydraulic system.
Description
Technical field
The utility model designs a kind of engineering machinery hydraulic oil return control loop.
Background technology
In construction machinery hydraulic system, in order to prevent hydraulic actuator rotary motor particularly in hydraulic crawler excavator
It is emptied, it is necessary to increase by first counterbalance valve on hydraulic system oil return line such that it is able to effectively protect rotary motor, but due to
First hypertonia of counterbalance valve can cause the back pressure of whole system too high, therefore increased second counterbalance valve, to solve
Back pressure value when recirculating oil quantity is big is real more than hydraulic system tolerance range, and general more than the 2.5bar of counterbalance valve setting value
Average working pressure has reached more than 4.0bar in the work of border, and peak value reaches 7.0bar or so, this results in whole system pressure
Power is raised, and causes the power loss that there is no need.
Simultaneously under in the winter or extremely cold weather condition of excavator, exist hydraulic oil temperature it is low increased it is preheated
Journey, simultaneously hydraulic system oil liquid return radiator still need to, by radiator heat-dissipation, so also have impact on whole hydraulic system
Temperature rise, causes unnecessary energy loss.
Utility model content
The utility model solves the deficiencies in the prior art and provides one kind and realize three kinds on the main oil return line of hydraulic multichannel valve group
The control of different pressures value, realizes the demand of various working, not only reduces energy consumption and also improves the whole thermal balance of hydraulic system
The engineering machinery hydraulic oil return control loop of state.
Following technical scheme is taken to reach above-mentioned purpose：
A kind of engineering machinery hydraulic oil return control loop, including hydraulic oil container and hydraulic multichannel valve group, the hydraulic oil container
Connected by the first oil return line and the second oil return line and hydraulic multichannel valve group between, second oil return line is provided with counterbalance valve,
Oil control valve and radiator are installed back, the control end of described time oil control valve is connected with electrically-controlled valve on first oil return line,
The control end of the electrically-controlled valve is connected with controlling organization, and the controlling organization is examined with the pressure of detection pilot-actuated valve pilot pressure
Device connection is surveyed, the controlling organization controls electrically-controlled valve to commutate by receiving with the data of processing pressure detection means.
Pilot-actuated valve is connected by pioneer pump with hydraulic oil container, and the pioneer pump is connected by electrically-controlled valve with oil control valve is returned
Connect.
The controlling organization is electrically connected with the temperature-detecting device of detection hydraulic oil container temperature, and the controlling organization is by connecing
Receive and treatment temperature detection means controls electrically-controlled valve commutation simultaneously with the data of pressure-detecting device.
Overflow valve is installed on the pilot-actuated valve and the oil circuit of pioneer pump connection, the overflow valve control pioneer pump
Hydraulic pressure.
The electrically-controlled valve is three position four-way electromagnetic valve.
Described time oil control valve is three two-way valves, and described time the oil return resistance of oil 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 controlling organization is electrically connected with display device.
The utility model increased back oil control valve, be received by controlling organization and treatment temperature detection means and pressure inspection
The data of device are surveyed, electrically-controlled valve is automatically controlled and is realized the control of hydraulic multichannel valve group oil return resistance, while ensure that revolution horse
Not being emptied when braking, returning oil control valve, to be that three two-way valves realize oil return resistance small or be zero left position so that is not required to
Want to make back oil control valve be in left position during oil return resistance, save energy；Oil control valve is in when oil return resistance is needed
Middle position, it is ensured that repairing when rotary motor is braked is without being emptied；Whole oil temperature in hydraulic system is low or temperature drop is than very fast
When, make back oil control valve be in right position, increase oil return resistance or prevent oil return its enter radiator, so that whole system energy
Amount circulation more rationally, loses small efficiency high.
Brief description of the drawings
Fig. 1 is hydraulic schematic diagram of the present utility model.
In accompanying drawing, 1, return oil control valve, 9, hydraulic motor, 10, radiator, 11, hydraulic oil container, 12, hydraulic multichannel valve group,
14th, repairing oil circuit, 15, pioneer pump, 17, pilot-actuated valve, 18, display device, the 20, first oil return line, the 21, second oil return line,
25th, overflow valve, 28, electrically-controlled valve, 29, controlling organization, 33, pressure-detecting device, 34, counterbalance valve, 37, temperature-detecting device.
Specific embodiment：
The utility model is described in further detail with implementation method 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 whole hydraulic system, the oil return of multichannel valve group 12 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 control valve is provided with back on the first oil return line 20
1 with radiator 10, it is three two logical pilot operated valve devices to return oil control valve 1, and left bit function realizes conducting but oil return resistance is low or be approximately
Zero, middle position functional realiey is turned on but possesses certain oil return resistance or pressure limit is between 1bar-4bar, particularly
2.5bar, right bit function is that cut-off or oil return resistance are very high, and such as oil return resistance is less than 12bar higher than 5bar, particularly
10bar.Second oil return line 21 possesses counterbalance valve, the return pressure for controlling the second oil return line 21, and pressure limit is in 2.5-
Between 6bar, particularly 4bar or 4.5bar.Second oil return line 21 is provided with counterbalance valve 34, parallel with the first oil return line 20, rises
The function simultaneously to the oil return of hydraulic multichannel valve group 12 is moved, repairing oil circuit 14 is connected with the first oil return line 20, the shape of the first oil return line 20
Into back pressure provide fluid to repairing oil circuit 14, and be supplied to hydraulic motor 9.
Pioneer pump 15 is used to provide the pressure oil-source of pilot circuit, supplies pilot-actuated valve 17, and with overflow valve 25 and first
Lead control valve 17 to connect, the hydraulic pressure of pioneer pump 15 is controlled by overflow valve 25, the control action of rotary motor 9 of pilot-actuated valve 17
Pressure signal, and pressure signal by pressure-detecting device 33 detection obtain and be input to controlling organization 29, the horse of rotary motor 9
It is connected with the second oil circuit of motor 4 up to the first oil circuit 3, the first oil circuit of motor 3 is the oil inlet and oil return master of motor with the second oil circuit of motor 4
Oil circuit.
Pressure-detecting device 33, temperature testing organization 37 are connected by wire with controlling organization 29 and are passed by data conductor
Controlling organization 29 is defeated by, display device 18 is connected with controlling organization 29 by wire, both data can be with transmitted in both directions, control machine
Structure 29 is connected with electrically-controlled valve 28, and the position of electrically-controlled valve is controlled by controlling organization 29.Electrically-controlled valve 28 is connected with pioneer pump 15, automatically controlled
The output pressure of valve 28 controls go back to the two ends of oil control valve 1 respectively, returns oil control valve 1 and possesses three two logical functions, according to two ends
Pressure controling signal obtain different spool positions, realize three kinds of control functions of different oil return resistances.
The action rear-guard hydrodynamic of pilot-actuated valve 17 pressure motor 9 is turned round forward or backwards, the pressure transmission of pilot-actuated valve 17
To pressure-detecting device 33 and controlling organization 29 is transferred to, controlling organization 29 is according to the pressure change of pressure-detecting device 33 to electricity
Control valve 28 is controlled.
When the pressure of pressure-detecting device 33 is zero, stablizes a certain value or be low from low to high, the output letter of controlling organization 29
Number control electrically-controlled valve 28 be located at right position, the control signal for now going back to the left side of oil control valve 1 is connected with pioneer pump 15, oil return
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 is to minimum or be zero；
When pressure-detecting device 33 pressure from high to low when, the output signal of controlling organization 29 control electrically-controlled valve 28 make its position
Centre position is returned to, the two ends control signal of oil control valve 1 is now returned and is returned hydraulic oil container, returned oil control valve 1 and be in interposition
Put, the first oil return line 20 possesses certain oil return resistance, between 1bar-4bar, particularly 2.5bar；
Temperature testing organization 37 is connected with controlling organization 29 by wire, when the temperature of temperature testing organization 37 is less than 20 degree
When, the output signal of controlling organization 29 control electrically-controlled valve 28 is in left position, now goes back to control signal and the elder generation on the right side of oil control valve 1
Lead pump 15 to connect, return oil control valve 1 and right position is switched to by middle position, the oil return resistance of the first oil return line 20 is raised, such as oil return resistance
12bar, particularly 10bar are less than higher than 5bar.
When temperature-detecting device 17 and pressure-detecting device 33 are acted on simultaneously, controlling organization 29 preferentially uses temperature detection
The signal of device 17, and control electrically-controlled valve 28.
Indication mechanism 18 can be transmitted mutually with the data of controlling organization 29, and be realized on indication mechanism 18 aobvious in real time
Show, or be input into different control models, realize back the control of the diverse location of oil control valve 1.
Claims (8)
1. a kind of engineering machinery hydraulic oil return control loop, including hydraulic oil container and hydraulic multichannel valve group, the hydraulic oil container and
Connected by the first oil return line and the second oil return line between hydraulic multichannel valve group, second oil return line is provided with counterbalance valve, its
It is characterised by：Oil control valve and radiator, the described time control end of oil control valve and electricity are installed back on first oil return line
Control valve connection, the control end of the electrically-controlled valve be connected with controlling organization, the controlling organization with detect the first pilot of pilot-actuated valve
The pressure-detecting device connection of power, the controlling organization controls electrically-controlled valve to change by receiving with the data of processing pressure detection means
To.
2. engineering machinery hydraulic oil return control loop according to claim 1, it is characterised in that：Pilot-actuated valve is by first
Lead pump to be connected with hydraulic oil container, the pioneer pump is connected by electrically-controlled valve with oil control valve is returned.
3. engineering machinery hydraulic oil return control loop according to claim 1 and 2, it is characterised in that：The controlling organization
Temperature-detecting device with detection hydraulic oil container temperature is electrically connected, and the controlling organization is by receiving and treatment temperature detection means
Electrically-controlled valve is controlled to commutate simultaneously with the data of pressure-detecting device.
4. engineering machinery hydraulic oil return control loop according to claim 3, it is characterised in that：The pilot-actuated valve and
Overflow valve is installed, the overflow valve controls the hydraulic pressure of pioneer pump on the oil circuit of pioneer pump connection.
5. engineering machinery hydraulic oil return control loop according to claim 4, it is characterised in that：The electrically-controlled valve is three
Four way solenoid valve.
6. engineering machinery hydraulic oil return control loop according to claim 5, it is characterised in that：Described time oil control valve is
Three two-way valves, described time the oil return resistance of oil control valve increases successively from left position to right position, and the oil return resistance of the left position is small
In 1bar, 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.
7. engineering machinery hydraulic oil return control loop according to claim 6, it is characterised in that：The middle position oil return resistance
It is 2.5bar, the right position oil return resistance is 10bar.
8. engineering machinery hydraulic oil return control loop according to claim 7, it is characterised in that：The controlling organization with it is aobvious
Showing device is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621445509.8U CN206290518U (en) | 2016-12-27 | 2016-12-27 | A kind of engineering machinery hydraulic oil return control loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621445509.8U CN206290518U (en) | 2016-12-27 | 2016-12-27 | A kind of engineering machinery hydraulic oil return control loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206290518U true CN206290518U (en) | 2017-06-30 |
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ID=59153969
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621445509.8U Active CN206290518U (en) | 2016-12-27 | 2016-12-27 | A kind of engineering machinery hydraulic oil return control loop |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762907A (en) * | 2016-12-27 | 2017-05-31 | 山河智能装备股份有限公司 | A kind of engineering machinery hydraulic oil return control loop and its control method |
-
2016
- 2016-12-27 CN CN201621445509.8U patent/CN206290518U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762907A (en) * | 2016-12-27 | 2017-05-31 | 山河智能装备股份有限公司 | A kind of engineering machinery hydraulic oil return control loop and its control method |
| CN106762907B (en) * | 2016-12-27 | 2018-08-14 | 山河智能装备股份有限公司 | A kind of engineering machinery hydraulic oil return control loop and its control method |
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