CN204553377U - Low energy consumption many actuators hydraulic system and excavator - Google Patents
Low energy consumption many actuators hydraulic system and excavator Download PDFInfo
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- CN204553377U CN204553377U CN201520100888.6U CN201520100888U CN204553377U CN 204553377 U CN204553377 U CN 204553377U CN 201520100888 U CN201520100888 U CN 201520100888U CN 204553377 U CN204553377 U CN 204553377U
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Abstract
The utility model relates to a kind of low energy consumption many actuators hydraulic system and excavator, wherein, low energy consumption many actuators hydraulic system comprises metering pump, load sensitive pump and several actuator, actuator at least comprises selector valve, valve post-compensators and power unit, metering pump is at least communicated with an actuator, load sensitive pump and each actuator parallel communication; The load feedback passage parallel communication total load feedback channel of each actuator, total load feedback channel is communicated with flow control valve, and flow control valve is communicated with load sensitive pump, and responsive to load pump carries out flow control; An actuator is had at least to meet the following conditions: the hydraulic oil that load sensitive pump provides can successively by after the selector valve in this actuator and valve post-compensators, the hydraulic oil provided with metering pump collaborates to enter the selector valve in this actuator, and then is the power unit fuel feeding in this actuator.The feature of the existing load sensitive system of the utility model, solves again the problem of response lag.
Description
Technical field
The utility model relates to hydraulic machinery field, particularly relates to a kind of low energy consumption many actuators hydraulic system and excavator.
Background technique
Current excavator hydraulic system is mainly divided into variable system and the large class of quantitative system two, wherein, variable system is mainly divided into the type such as single pump or double pump load sensitive system, minus flow system, positive flow system, metering pump throttle system, the excavator of this Four types respectively has feature: load sensitive system energy-saving effect is obvious, but maneuverability is poor; Minus flow system energy-conservation handling good, but the motion adaptive of many actuators is poor, and energy-saving effect is general; Energy-conservation and the good operability of positive flow control system, but the motion adaptive of many actuators is poor, and cost is higher; The structure of throttle control system is simple, and cost is little, but energy consumption is high.
No matter being variable system or quantitative system, all there is drawback in the existing hydraulic system of excavator: tonnage excavator load sensitive system is mainly same discharge capacity double pump variable system, the drawbacks such as it is delayed that load sensitive pump exists responsiveness, and the stability of a system is poor; Tonnage minus flow be equally double pump with displacement hydraulic system, there is the drawbacks such as workload-adaptability is poor; Positive flow pump hydraulic system controls energy-conservation and good operability, and many actuators motion adaptive is poor, and cost is higher; Throttle control system is general only for mini-excavator system, and system is simple, and safeguard simple, cost is little, and energy consumption is high.
Tonnage excavator is when composite move, Dual-pump flow-converging operating mode is more, for ensureing composite move harmony, reducing the throttle valve openings of sizes controlled by pilot pressure that certain actuator's pilot pressure or dependence is arranged on before action connection when the motion speed between each actuator mainly relies on composite move and coordinating.This type of controls the mode of each actuator motion speed, adds the complexity of hydraulic system, and too much throttle orifice adds the energy loss of main valve simultaneously, and excavator energy consumption is higher.
Model utility content
The purpose of this utility model proposes a kind of low energy consumption many actuators hydraulic system and excavator, and it has the feature of load sensitive system, solves again the problem of load sensitive system response lag simultaneously.
For achieving the above object, the utility model provides a kind of low energy consumption many actuators hydraulic system, it comprises metering pump, load sensitive pump and several actuator, described actuator at least comprises selector valve, valve post-compensators and power unit, described metering pump is at least communicated with a described actuator, described load sensitive pump and each described actuator parallel communication; The load feedback passage parallel communication total load feedback channel of each described actuator, described total load feedback channel is communicated with flow control valve, and described flow control valve is communicated with described load sensitive pump, carries out flow control to described load sensitive pump;
A described actuator is had at least to meet the following conditions:
The hydraulic oil that described load sensitive pump provides can successively by after the selector valve in actuator described in this and valve post-compensators, the hydraulic oil provided with described metering pump collaborates the selector valve entered in actuator described in this, and then is the power unit fuel feeding in actuator described in this.
One preferably or in embodiment, described several actuator at least comprises the first actuator and the second actuator, described metering pump and described first actuator and described second actuator's parallel communication;
Described first actuator at least comprises the first selector valve, the first valve post-compensators and the first power unit; Described second actuator at least comprises the second selector valve, the second valve post-compensators and the second power unit;
Under described first actuator's working state: the hydraulic oil that described load sensitive pump provides can successively by described first selector valve and described first valve post-compensators, the hydraulic oil provided with described metering pump collaborates to enter described first selector valve, and then is described first power unit fuel feeding;
Under described second actuator's working state: the hydraulic oil that described load sensitive pump provides can successively by described second selector valve and described second valve post-compensators, the hydraulic oil provided with described metering pump collaborates to enter described second selector valve, and then is described second power unit fuel feeding.
One preferably or in embodiment, the oil circuit that described metering pump is communicated with described second actuator is provided with one-way throttle valve, when described first actuator and described second actuator's composite move, described metering pump is preferentially to described first actuator's fuel feeding.
One preferably or in embodiment, first throttle control valve is also comprised in described first actuator, when described first throttle control valve is opened, the oil return of one of them actuator port of described first power unit can enter described first throttle control valve by described first selector valve, described first selector valve is again returned by described first throttle control valve, then enter another actuator port of described first power unit, realize flow regeneration.
One preferably or in embodiment, also comprise the 3rd actuator, described 3rd actuator comprises the 3rd selector valve, the 3rd valve post-compensators and the 3rd power unit; When described first selector valve, described second selector valve and described 3rd selector valve are positioned at meta, the hydraulic oil that described metering pump provides is connected through the meta of the meta of described first selector valve, the meta of described second selector valve and described 3rd selector valve successively, flows into fuel tank.
One preferably or in embodiment, also comprise the 4th actuator, described 4th actuator comprises the 4th selector valve, the 4th valve post-compensators and the 4th power unit; When described first selector valve, described second selector valve, described 3rd selector valve and described 4th selector valve are positioned at meta, the hydraulic oil that described metering pump provides is connected through the meta of the meta of the meta of described first selector valve, described second selector valve, the meta of described 3rd selector valve and described 4th selector valve successively, flows into fuel tank.
One preferably or in embodiment, on the oil circuit that the meta of described first selector valve is communicated with the meta of described second selector valve, side is connected to the first oil circuit, described first oil circuit is communicated with the oil feeding line of described load sensitive pump, described first oil circuit is provided with the first one-way valve and second section flow control valve.
One preferably or in embodiment, when described second actuator and described 4th actuator's composite move, described second section flow control valve is opened, the preferential action of described 4th actuator, and the inlet pressure being increased described second selector valve by the cracking pressure that described first one-way valve is arranged.
One preferably or in embodiment, when described second actuator and described 3rd actuator's composite move, described second section flow control valve closedown, the preferential action of described second actuator.
One preferably or in embodiment, on the oil circuit that the meta of described second selector valve is communicated with the meta of described 3rd selector valve, side is connected to the second oil circuit, described second oil circuit is communicated with the oil feeding line of described load sensitive pump, and described second oil circuit is provided with the second one-way valve.
One preferably or in embodiment, the meta of described the metering pump meta of the first selector valve described in serial communication, the meta of described second selector valve, the meta of described 3rd selector valve and described 4th selector valve successively, the oil circuit be finally communicated with fuel tank is provided with back pressure valve.
One preferably or in embodiment, the pressure oil that described metering pump provides is actuator described in parallel or serial communication by the 3rd one-way valve, and the oil circuit that is communicated with described first actuator of described metering pump is provided with the 4th one-way valve.
Preferably or in embodiment, described total load feedback oil circuit is provided with throttle valve one.
One preferably or in embodiment, described selector valve at least comprises meta, the first working position and the second working position, when described selector valve is positioned at meta, described metering pump and described load sensitive pump be not all to the described power unit fuel feeding that described selector valve is corresponding, when described selector valve is positioned at the first working position and the second working position, described metering pump and described load sensitive pump all can to the corresponding described power unit fuel feeding of described selector valve.
One preferably or in embodiment, described selector valve is three nine logical selector valves.
One preferably or in embodiment, described first actuator is swing arm actuator, and described first power unit is boom cylinder, and described second actuator is rotary power unit, and described second power unit is rotary motor.
One preferably or in embodiment, described 3rd actuator is dipper actuator, and described 3rd power unit is bucket arm cylinder.
One preferably or in embodiment, described 4th actuator is walking actuator, and described 4th power unit is running motor.
Preferably or in embodiment, the load feedback passage of described 4th actuator is provided with throttling shock absorbing valve one.
For achieving the above object, the utility model additionally provides a kind of excavator, and it comprises the low energy consumption many actuators hydraulic system in above-mentioned any embodiment.
Based on technique scheme, the utility model at least has following beneficial effect:
Low energy consumption many actuators hydraulic system that the utility model provides, quantitative system and load sensitive system combine, both there is the feature of load sensitive system, solve again the problem of load sensitive system response lag simultaneously, and by metering pump and load sensitive pump as power source, by the assignment of traffic of metering pump, the energy loss of system can be reduced, simplify system cost and structure.
Low energy consumption many actuators hydraulic system that the utility model provides can be applied in the conglomerate hydraulic machineries such as engineering machinery, metallurgical machinery, mining machinery, water conservancy machinery.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
The principle schematic of low energy consumption many actuators hydraulic system that Fig. 1 provides for the utility model.
Attached number in the figure:
1-load sensitive pump; 2-throttle valve; 3-metering pump; 4-first throttle control valve; 5-one-way throttle valve; 6-first valve post-compensators; 7-first selector valve; 8-first one-way valve; 9-second one-way valve; 10-second section flow control valve; 11-second valve post-compensators; 12-second selector valve; 13-first power unit; 14-second power unit; 15-the 3rd power unit; 16-the 4th power unit; 17-the 3rd selector valve; 18-the 4th selector valve; 19-the 3rd valve post-compensators; 20-the 3rd one-way valve; 21-throttling shock absorbing valve; 22-the 4th one-way valve; 23-the 4th valve post-compensators; 24-back pressure valve; 25-the 5th one-way valve; 26-the 6th one-way valve.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in embodiment is clearly and completely described.Obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiments.Based on embodiment of the present utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore the restriction to the utility model protection domain can not be interpreted as.
As shown in Figure 1, for the illustrative examples of low energy consumption many actuators hydraulic system that the utility model provides, in this illustrative examples, low energy consumption many actuators hydraulic system comprises metering pump 3, load sensitive pump 1 and several actuator, such as: one or more actuator, the flow of load sensitive pump 1 is greater than the flow of metering pump 3, actuator at least comprises selector valve, valve post-compensators and power unit, metering pump 3 is at least communicated with an actuator, load sensitive pump 1 and each actuator parallel communication; The load feedback passage parallel communication total load feedback channel of each actuator, total load feedback channel is communicated with flow control valve, and flow control valve is communicated with load sensitive pump 1, and responsive to load pump 1 carries out flow control; Total load feedback oil circuit can also be provided with throttle valve 2.
An actuator is had at least to meet the following conditions:
The hydraulic oil that load sensitive pump 1 provides can successively by after the selector valve in this actuator and valve post-compensators, and the hydraulic oil provided with metering pump 3 collaborates to enter the selector valve in this actuator, and then is the power unit fuel feeding in this actuator.
In above-mentioned illustrative examples, the mode adopting metering pump 3 and load sensitive pump 1 to combine provides power for actuator, low energy consumption many actuators hydraulic system that the utility model is provided both had had the feature of load sensitive system, solve again the problem of load sensitive system response lag simultaneously, and pass through the assignment of traffic of metering pump 3, the energy loss of system can be reduced, simplify system cost and structure.
In the illustrative examples of low energy consumption many actuators hydraulic system that the utility model provides, several actuator at least can comprise the first actuator and the second actuator, metering pump 3 and the first actuator and second actuator's parallel communication;
First actuator at least can comprise the first selector valve 7, first valve post-compensators 6 and the first power unit 13; Second actuator at least can comprise the second selector valve 12, second valve post-compensators 11 and the second power unit 14.
Under the working state of the first actuator: the hydraulic oil that load sensitive pump 1 provides can successively by the first selector valve 7 and the first valve post-compensators 6, the hydraulic oil provided with metering pump 3 collaborates to enter the first selector valve 7, then entering the first power unit 13 by the first selector valve 7, is the first power unit 13 fuel feeding; Further, after the first valve post-compensators 6, be provided with the 5th one-way valve 25, the hydraulic oil that hydraulic oil is provided by the first valve post-compensators 6 and the 5th one-way valve 25 and metering pump 3 collaborates to enter the first selector valve 7.
Under the working state of the second actuator: the hydraulic oil that load sensitive pump 1 provides can successively by the second selector valve 12 and the second valve post-compensators 11, the hydraulic oil provided with metering pump 3 collaborates to enter the second selector valve 12, then entering the second power unit 14 by the second selector valve 12, is the second power unit 14 fuel feeding.Further, by being provided with the 6th one-way valve 26 after the second valve post-compensators 11, the hydraulic oil that hydraulic oil is provided by the second valve post-compensators 11 and the 6th one-way valve 26 and metering pump 3 collaborates to enter the second selector valve 12.
In the illustrative examples of low energy consumption many actuators hydraulic system that the utility model provides, the oil circuit that metering pump 3 is communicated with the second actuator can be provided with one-way throttle valve 5, when the first actuator and second actuator's composite move, due to the effect of one-way throttle valve 5, metering pump 3 is preferential to first actuator's fuel feeding, improves the motion adaptive of many actuators.
In the illustrative examples of low energy consumption many actuators hydraulic system that the utility model provides, first throttle control valve 4 can also be comprised in first actuator, when first throttle control valve 4 is opened, the oil return of one of them actuator port of the first power unit 13 can enter first throttle control valve 4 by the first selector valve 7, the first selector valve 7 is again returned by first throttle control valve 4, then enter another actuator port of the first power unit 13, realize flow regeneration.Wherein, the hydraulic oil that first throttle control valve 4 can be provided by another actuator port of the first power unit 13 is opened.
Low energy consumption many actuators hydraulic system that the utility model provides can also comprise the 3rd actuator, and the 3rd actuator comprises the 3rd selector valve 17, the 3rd valve post-compensators 19 and the 3rd power unit 15; When the first selector valve 7, second selector valve 12 and the 3rd selector valve 17 are positioned at meta, the hydraulic oil that metering pump 3 provides is connected through the meta of the meta of the first selector valve 7, the meta of the second selector valve 12 and the 3rd selector valve 17 successively, flows into fuel tank.
Low energy consumption many actuators hydraulic system that the utility model provides can also comprise the 4th actuator, and the 4th actuator comprises the 4th selector valve 18, the 4th valve post-compensators 23 and the 4th power unit 16; When the first selector valve 7, second selector valve 12, the 3rd selector valve 17 and the 4th selector valve 18 are positioned at meta, the hydraulic oil that metering pump 3 provides is connected through the meta of the meta of the first selector valve 7, the meta of the second selector valve 12, the meta of the 3rd selector valve 17 and the 4th selector valve 18 successively, flows into fuel tank.Further, the meta of metering pump 3 meta of serial communication first selector valve 7, the meta of the second selector valve 12, the meta of the 3rd selector valve 17 and the 4th selector valve 18 successively, the oil circuit be finally communicated with fuel tank can be provided with back pressure valve 24.
In above-mentioned illustrative examples, metering pump 3 passes through parallel oil road direction first actuator and second actuator's fuel feeding, by series connection to the 3rd actuator and the 4th actuator's fuel feeding.
Low energy consumption many actuators hydraulic system that the utility model provides, be not limited to comprise the first above-mentioned actuator, the second actuator, the 3rd actuator and the 4th actuator, the actuator of the 5th actuator etc. more than four can also be comprised, can arrange according to actual conditions.
In the illustrative examples of low energy consumption many actuators hydraulic system that the utility model provides, on the oil circuit that the meta of the first selector valve 7 is communicated with the meta of the second selector valve 12, side is connected to the first oil circuit, first oil circuit is communicated with the oil feeding line of load sensitive pump 1, each actuator of oil feeding line parallel communication of load sensitive pump 1, the first oil circuit is provided with the first one-way valve 8 and second section flow control valve 10.
When the second actuator and the 4th actuator's composite move: second section flow control valve 10 is opened, the preferential action of 4th actuator, and the inlet pressure of the second selector valve 12 is increased by the cracking pressure that the first one-way valve 8 is arranged, improve the motion adaptive of many actuators.
When the second actuator and the 3rd actuator's composite move: second section flow control valve 10 is closed, the preferential action of the second actuator, improves the motion adaptive of many actuators.
In the illustrative examples of low energy consumption many actuators hydraulic system that the utility model provides, on the oil circuit that the meta of the second selector valve 12 is communicated with the meta of the 3rd selector valve 17, side is connected to the second oil circuit, second oil circuit is communicated with the oil feeding line of load sensitive pump 1, second oil circuit is provided with the second one-way valve 9, when the first actuator and the second execution architecture are positioned at meta, the hydraulic oil that metering pump 3 provides enters the oil feeding line of load sensitive pump 1 by the second one-way valve 9 on the second oil circuit, can be the 3rd actuator and the 4th actuator's fuel feeding.
In the illustrative examples of low energy consumption many actuators hydraulic system that the utility model provides, the oil feeding line parallel connection of metering pump 3 or serial communication actuator, and on the oil feeding line of metering pump 3, be provided with the 3rd one-way valve 20, by the 3rd one-way valve 20, in parallel or series connection enters actuator to the pressure oil that described metering pump 3 provides, and the oil circuit that is communicated with the first actuator of the oil feeding line of metering pump 3 is provided with the 4th one-way valve 22.
In the illustrative examples of low energy consumption many actuators hydraulic system that the utility model provides, selector valve at least comprises meta, the first working position and the second working position, when selector valve is positioned at meta, metering pump 3 and load sensitive pump 1 be not all to the power unit fuel feeding that selector valve is corresponding, when selector valve is positioned at the first working position and the second working position, metering pump 3 and load sensitive pump 1 all can to the corresponding power unit fuel feeding of selector valve.
Selector valve at least comprises nine hydraulic fluid ports, from the orientation shown in Fig. 1, in figure, the right side of selector valve is followed successively by the first hydraulic fluid port, the second hydraulic fluid port, the 3rd hydraulic fluid port, the 4th hydraulic fluid port and the 5th hydraulic fluid port from top to bottom, and in figure, the left side of selector valve is followed successively by the 6th hydraulic fluid port, the 7th hydraulic fluid port, the 8th hydraulic fluid port and the 9th hydraulic fluid port from top to bottom.In figure, selector valve is followed successively by the first working position, meta and the second working position from top to bottom.
Selector valve is when meta: the first hydraulic fluid port, the second hydraulic fluid port, the 3rd hydraulic fluid port, the 5th hydraulic fluid port, the 6th hydraulic fluid port, the 7th hydraulic fluid port and the 9th hydraulic fluid port are cut-off state, and the 4th hydraulic fluid port is communicated with the 8th hydraulic fluid port;
Selector valve is when the first working position: the first hydraulic fluid port is communicated with the 6th hydraulic fluid port, and the second hydraulic fluid port, the 4th hydraulic fluid port and the 8th hydraulic fluid port end, and the 3rd hydraulic fluid port is communicated with the 7th hydraulic fluid port, and the 5th hydraulic fluid port is communicated with the 9th hydraulic fluid port;
Selector valve is when the second working position: the first hydraulic fluid port, the 4th hydraulic fluid port and the 8th hydraulic fluid port end, and the second hydraulic fluid port is communicated with the 7th hydraulic fluid port, and the 3rd hydraulic fluid port is communicated with the 6th hydraulic fluid port; 5th hydraulic fluid port of the selector valve in the first actuator and the cut-off of the 9th hydraulic fluid port, the 5th hydraulic fluid port of the selector valve in the second actuator, the 3rd actuator, the 4th actuator is communicated with the 9th hydraulic fluid port.
One preferably or in embodiment, selector valve can be three nine logical selector valves.
Low energy consumption many actuators hydraulic system that the utility model provides can be applied in the machinery such as excavator.
In the illustrative examples of the excavator provided at the utility model, excavator comprises the low energy consumption many actuators hydraulic system in above-mentioned any embodiment.
Enumerate low energy consumption many actuators hydraulic system applications specific embodiment on board a dredger that the utility model provides below.
As shown in Figure 1, in this specific embodiment, the first actuator can be swing arm actuator, and the first power unit 13 can be boom cylinder; Second actuator can be rotary power unit, and the second power unit 14 can be rotary motor; 3rd actuator can be dipper actuator, and the 3rd power unit 15 can be bucket arm cylinder; 4th actuator can be walking actuator, and the 4th power unit 16 can be running motor.And on the load feedback passage of the 4th actuator, be provided with throttling shock absorbing valve 21, for carrying out filtering shock absorbing to walking induced pressure, reduce main pump pressure.
Load sensitive pump 1 by shunt circuit respectively to boom cylinder (the first actuator 13), rotary motor (the second actuator 14), bucket arm cylinder (the 3rd actuator 15), running motor (the 4th actuator 16) fuel feeding, metering pump 3 joins meta, finally by back pressure valve 24 oil sump tank by flowing to each after the 3rd one-way valve 20.
Metering pump 3 is undertaken collaborating the rodless cavity fuel feeding to boom cylinder by valve post-compensators 6 and the 5th one-way valve 25 with the oil outlet of load sensitive pump 1 by the 3rd one-way valve 20 and the 4th one-way valve 22, metering pump 3, directly to boom cylinder fuel feeding, reduces main valve energy loss; Metering pump 3 is by one-way throttle valve 5 to rotary motor fuel feeding, and load sensitive pump 1 carries out collaborating to rotary motor fuel feeding by the second selector valve 12 and by recuperation valve 11 and the 6th one-way valve 26 with the flow of metering pump 3.Above-mentioned metering pump 3 is not by the swing arm alliance oil of priority restriction directly to excavator, and reduce the pressure loss, reduce energy consumption, metering pump 3 is in parallel to rotation oil fuel feeding by a throttle orifice.
When swing arm does not work, metering pump 3 passes through the 3rd one-way valve 20 to dipper actuator and walking actuator fuel feeding.
When swing arm actuator and rotary power unit composite move, metering pump 3 is multiple and swing arm actuator fuel feeding to rotary power unit, but metering pump 3 is preferential to swing arm actuator fuel feeding, improves swing arm height fast, realizes coordination.When swing arm declines, the opening of the Stress control throttling control valve 4 of boom cylinder rod chamber, flows to the rod chamber of boom cylinder by throttling control valve 4 by the rodless cavity flow of boom cylinder, realizes the regeneration of swing arm flow.When swing arm does not work, the flow that metering pump 3 provides flows to dipper actuator and walking actuator by the meta of the first selector valve 7 and the first one-way valve 8.
When walking actuator and rotary power unit composite move, walking pilot pressure controls the openings of sizes of throttling control valve 10, throttling control valve 10 is opened, actuator loses preferential interaction, first one-way valve 8 is provided with 25bar pressure simultaneously, the pressure that first one-way valve 8 is arranged makes the inlet pressure of the second selector valve increase, and improves rotary torque.Above-mentioned metering pump 3 by with pressure drop one-way valve and control throttle valve to walking fuel feeding, one-way valve improves rotation pressure, adds rotary torque.
When rotary power unit and dipper actuator composite move, throttling control valve 10 is closed, and the action of rotary power unit has precedence over the action of dipper actuator.
In this system, each connection induced pressure flow in the sensitive cavity of the flow control valve of load sensitive pump 1 by throttle valve 2, responsive to load pump 1 carries out flow control, walking connection load feedback channel setting has throttling shock absorbing valve 21 for carrying out filtering shock absorbing to walking induced pressure, reduces main pump pressure.
In above-mentioned specific embodiment, adopt metering pump and load sensitive pump as excavator power source, metering pump passes through parallel oil road direction swing arm and rotation oil fuel feeding, by series loop to dipper, walking, scraper bowl loop fuel feeding.This hydraulic system has the feature of load sensitive system, and simultaneous quantitative pumping system solves again the problem of load sensitive system response lag, and in addition, it is simple that this system uses metering pump to have structure, the features such as easy care.
In description of the present utility model; it will be appreciated that; the word such as " first ", " second ", " the 3rd " is used to limit component; be only used to be convenient to distinguish above-mentioned parts; as there is no Stated otherwise; above-mentioned word does not have particular meaning, therefore can not be interpreted as the restriction to the utility model protection domain.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to embodiment of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technological scheme scope of the utility model request protection.
Claims (20)
1. low energy consumption many actuators hydraulic system, it is characterized in that: comprise metering pump (3), load sensitive pump (1) and several actuator, described actuator at least comprises selector valve, valve post-compensators and power unit, described metering pump (3) is at least communicated with a described actuator, described load sensitive pump (1) and each described actuator parallel communication; The load feedback passage parallel communication total load feedback channel of each described actuator, described total load feedback channel is communicated with flow control valve, described flow control valve is communicated with described load sensitive pump (1), carries out flow control to described load sensitive pump (1);
A described actuator is had at least to meet the following conditions:
The hydraulic oil that described load sensitive pump (1) provides can successively by after the selector valve in actuator described in this and valve post-compensators, the hydraulic oil provided with described metering pump (3) collaborates the selector valve entered in actuator described in this, and then is the power unit fuel feeding in actuator described in this.
2. low energy consumption many actuators as claimed in claim 1 hydraulic system, it is characterized in that: described several actuator at least comprises the first actuator and the second actuator, described metering pump (3) and described first actuator and described second actuator's parallel communication;
Described first actuator at least comprises the first selector valve (7), the first valve post-compensators (6) and the first power unit (13); Described second actuator at least comprises the second selector valve (12), the second valve post-compensators (11) and the second power unit (14);
Under described first actuator's working state: the hydraulic oil that described load sensitive pump (1) provides can successively by described first selector valve (7) and described first valve post-compensators (6), the hydraulic oil provided with described metering pump (3) collaborates to enter described first selector valve (7), and then is described first power unit (13) fuel feeding;
Under described second actuator's working state: the hydraulic oil that described load sensitive pump (1) provides can successively by described second selector valve (12) and described second valve post-compensators (11), the hydraulic oil provided with described metering pump (3) collaborates to enter described second selector valve (12), and then is described second power unit (14) fuel feeding.
3. low energy consumption many actuators as claimed in claim 2 hydraulic system, it is characterized in that: the oil circuit that described metering pump (3) is communicated with described second actuator is provided with one-way throttle valve (5), when described first actuator and described second actuator's composite move, described metering pump (3) is preferential to described first actuator's fuel feeding.
4. low energy consumption many actuators as claimed in claim 3 hydraulic system, it is characterized in that: in described first actuator, also comprise first throttle control valve (4), when described first throttle control valve (4) is opened, the oil return of one of them actuator port of described first power unit (13) can enter described first throttle control valve (4) by described first selector valve (7), described first selector valve (7) is again returned by described first throttle control valve (4), then another actuator port of described first power unit (13) is entered, realize flow regeneration.
5. low energy consumption many actuators as claimed in claim 2 hydraulic system, it is characterized in that: also comprise the 3rd actuator, described 3rd actuator comprises the 3rd selector valve (17), the 3rd valve post-compensators (19) and the 3rd power unit (15); When described first selector valve (7), described second selector valve (12) and described 3rd selector valve (17) are positioned at meta, the hydraulic oil that described metering pump (3) provides is connected through the meta of the meta of described first selector valve (7), the meta of described second selector valve (12) and described 3rd selector valve (17) successively, flows into fuel tank.
6. low energy consumption many actuators as claimed in claim 5 hydraulic system, it is characterized in that: also comprise the 4th actuator, described 4th actuator comprises the 4th selector valve (18), the 4th valve post-compensators (23) and the 4th power unit (16); When described first selector valve (7), described second selector valve (12), described 3rd selector valve (17) and described 4th selector valve (18) are positioned at meta, the hydraulic oil that described metering pump (3) provides is connected through the meta of the meta of described first selector valve (7), the meta of described second selector valve (12), the meta of described 3rd selector valve (17) and described 4th selector valve (18) successively, flows into fuel tank.
7. low energy consumption many actuators as claimed in claim 6 hydraulic system, it is characterized in that: on the oil circuit that the meta of described first selector valve (7) is communicated with the meta of described second selector valve (12), side is connected to the first oil circuit, described first oil circuit is communicated with the oil feeding line of described load sensitive pump (1), described first oil circuit is provided with the first one-way valve (8) and second section flow control valve (10).
8. low energy consumption many actuators as claimed in claim 7 hydraulic system, it is characterized in that: when described second actuator and described 4th actuator's composite move, described second section flow control valve (10) is opened, the preferential action of described 4th actuator, and the inlet pressure being increased described second selector valve (12) by the cracking pressure that described first one-way valve (8) is arranged.
9. low energy consumption many actuators as claimed in claim 7 hydraulic system, it is characterized in that: when described second actuator and described 3rd actuator's composite move, described second section flow control valve (10) is closed, the preferential action of described second actuator.
10. low energy consumption many actuators as claimed in claim 7 hydraulic system, it is characterized in that: on the oil circuit that the meta of described second selector valve (12) is communicated with the meta of described 3rd selector valve (17), side is connected to the second oil circuit, described second oil circuit is communicated with the oil feeding line of described load sensitive pump (1), described second oil circuit is provided with the second one-way valve (9).
11. low energy consumption many actuators as claimed in claim 6 hydraulic systems, it is characterized in that: the meta of described metering pump (3) meta of the first selector valve (7) described in serial communication, the meta of described second selector valve (12), the meta of described 3rd selector valve (17) and described 4th selector valve (18) successively, the oil circuit be finally communicated with fuel tank is provided with back pressure valve (24).
12. low energy consumption many actuators as claimed in claim 2 hydraulic systems, it is characterized in that: the pressure oil that described metering pump (3) provides is actuator described in parallel or serial communication by the 3rd one-way valve (20), and the oil circuit that is communicated with described first actuator of described metering pump (3) is provided with the 4th one-way valve (22).
13. low energy consumption many actuators as claimed in claim 1 hydraulic systems, is characterized in that: described total load feedback oil circuit is provided with throttle valve (2).
14. low energy consumption many actuators as claimed in claim 1 hydraulic systems, it is characterized in that: described selector valve at least comprises meta, the first working position and the second working position, when described selector valve is positioned at meta, described metering pump (3) and described load sensitive pump (1) be not all to the described power unit fuel feeding that described selector valve is corresponding, when described selector valve is positioned at the first working position and the second working position, described metering pump (3) and described load sensitive pump (1) all can to the corresponding described power unit fuel feeding of described selector valve.
15. low energy consumption many actuators as claimed in claim 14 hydraulic systems, is characterized in that: described selector valve is three nine logical selector valves.
16. low energy consumption many actuators as claimed in claim 2 hydraulic systems, it is characterized in that: described first actuator is swing arm actuator, described first power unit (13) is boom cylinder, described second actuator is rotary power unit, and described second power unit (14) is rotary motor.
17. low energy consumption many actuators as claimed in claim 5 hydraulic systems, is characterized in that: described 3rd actuator is dipper actuator, and described 3rd power unit (15) is bucket arm cylinder.
18. low energy consumption many actuators as claimed in claim 6 hydraulic systems, is characterized in that: described 4th actuator is walking actuator, and described 4th power unit (16) is running motor.
19. low energy consumption many actuators as claimed in claim 18 hydraulic systems, is characterized in that: the load feedback passage of described 4th actuator is provided with throttling shock absorbing valve (21).
20. 1 kinds of excavators, is characterized in that: comprise the low energy consumption many actuators hydraulic system as described in any one of claim 1-19.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520100888.6U CN204553377U (en) | 2015-02-11 | 2015-02-11 | Low energy consumption many actuators hydraulic system and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520100888.6U CN204553377U (en) | 2015-02-11 | 2015-02-11 | Low energy consumption many actuators hydraulic system and excavator |
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| Publication Number | Publication Date |
|---|---|
| CN204553377U true CN204553377U (en) | 2015-08-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520100888.6U Withdrawn - After Issue CN204553377U (en) | 2015-02-11 | 2015-02-11 | Low energy consumption many actuators hydraulic system and excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204553377U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105133686A (en) * | 2015-08-28 | 2015-12-09 | 黄进堂 | Energy-saving and efficient excavator hydraulic system |
| CN105987033A (en) * | 2015-02-11 | 2016-10-05 | 徐工集团工程机械股份有限公司 | Low-energy-consumption multi-actuation-mechanism hydraulic system and excavator |
| CN106523450A (en) * | 2015-09-15 | 2017-03-22 | 胡斯可国际股份有限公司 | Metered fluid source connection to downstream functions in PCLS systems |
| CN110185083A (en) * | 2019-06-03 | 2019-08-30 | 青岛雷沃工程机械有限公司 | A kind of regenerating energy-saving formula dipper excavation hydraulic control system |
-
2015
- 2015-02-11 CN CN201520100888.6U patent/CN204553377U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987033A (en) * | 2015-02-11 | 2016-10-05 | 徐工集团工程机械股份有限公司 | Low-energy-consumption multi-actuation-mechanism hydraulic system and excavator |
| CN105133686A (en) * | 2015-08-28 | 2015-12-09 | 黄进堂 | Energy-saving and efficient excavator hydraulic system |
| CN106523450A (en) * | 2015-09-15 | 2017-03-22 | 胡斯可国际股份有限公司 | Metered fluid source connection to downstream functions in PCLS systems |
| CN110185083A (en) * | 2019-06-03 | 2019-08-30 | 青岛雷沃工程机械有限公司 | A kind of regenerating energy-saving formula dipper excavation hydraulic control system |
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Granted publication date: 20150812 Effective date of abandoning: 20180814 |